ART: Move dex structs into own header

Separating out the structs from DexFile allows them to be forward-
declared, which reduces the need to include the dex_file header.

Bug: 119869270
Test: m
Change-Id: I32dde5a632884bca7435cd584b4a81883de2e7b4
diff --git a/runtime/art_field-inl.h b/runtime/art_field-inl.h
index 53e4c11..fb41418 100644
--- a/runtime/art_field-inl.h
+++ b/runtime/art_field-inl.h
@@ -291,7 +291,7 @@
     return field_index == 0 ? "[Ljava/lang/Class;" : "[[Ljava/lang/Class;";
   }
   const DexFile* dex_file = GetDexFile();
-  const DexFile::FieldId& field_id = dex_file->GetFieldId(field_index);
+  const dex::FieldId& field_id = dex_file->GetFieldId(field_index);
   return dex_file->GetFieldTypeDescriptor(field_id);
 }
 
@@ -342,7 +342,7 @@
 inline ObjPtr<mirror::String> ArtField::ResolveNameString() {
   uint32_t dex_field_index = GetDexFieldIndex();
   CHECK_NE(dex_field_index, dex::kDexNoIndex);
-  const DexFile::FieldId& field_id = GetDexFile()->GetFieldId(dex_field_index);
+  const dex::FieldId& field_id = GetDexFile()->GetFieldId(dex_field_index);
   return Runtime::Current()->GetClassLinker()->ResolveString(field_id.name_idx_, this);
 }
 
diff --git a/runtime/art_method-inl.h b/runtime/art_method-inl.h
index fda269c..02196ba 100644
--- a/runtime/art_method-inl.h
+++ b/runtime/art_method-inl.h
@@ -224,11 +224,11 @@
 
 inline ObjPtr<mirror::String> ArtMethod::ResolveNameString() {
   DCHECK(!IsProxyMethod());
-  const DexFile::MethodId& method_id = GetDexFile()->GetMethodId(GetDexMethodIndex());
+  const dex::MethodId& method_id = GetDexFile()->GetMethodId(GetDexMethodIndex());
   return Runtime::Current()->GetClassLinker()->ResolveString(method_id.name_idx_, this);
 }
 
-inline const DexFile::CodeItem* ArtMethod::GetCodeItem() {
+inline const dex::CodeItem* ArtMethod::GetCodeItem() {
   return GetDexFile()->GetCodeItem(GetCodeItemOffset());
 }
 
@@ -245,16 +245,16 @@
   return annotations::GetLineNumFromPC(GetDexFile(), this, dex_pc);
 }
 
-inline const DexFile::ProtoId& ArtMethod::GetPrototype() {
+inline const dex::ProtoId& ArtMethod::GetPrototype() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
   return dex_file->GetMethodPrototype(dex_file->GetMethodId(GetDexMethodIndex()));
 }
 
-inline const DexFile::TypeList* ArtMethod::GetParameterTypeList() {
+inline const dex::TypeList* ArtMethod::GetParameterTypeList() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
-  const DexFile::ProtoId& proto = dex_file->GetMethodPrototype(
+  const dex::ProtoId& proto = dex_file->GetMethodPrototype(
       dex_file->GetMethodId(GetDexMethodIndex()));
   return dex_file->GetProtoParameters(proto);
 }
@@ -273,7 +273,7 @@
   }
 }
 
-inline const DexFile::ClassDef& ArtMethod::GetClassDef() {
+inline const dex::ClassDef& ArtMethod::GetClassDef() {
   DCHECK(!IsProxyMethod());
   return GetDexFile()->GetClassDef(GetClassDefIndex());
 }
@@ -344,8 +344,8 @@
 inline dex::TypeIndex ArtMethod::GetReturnTypeIndex() {
   DCHECK(!IsProxyMethod());
   const DexFile* dex_file = GetDexFile();
-  const DexFile::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
-  const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
+  const dex::MethodId& method_id = dex_file->GetMethodId(GetDexMethodIndex());
+  const dex::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
   return proto_id.return_type_idx_;
 }
 
diff --git a/runtime/art_method.cc b/runtime/art_method.cc
index 5f5361a..dd5b0d5 100644
--- a/runtime/art_method.cc
+++ b/runtime/art_method.cc
@@ -133,7 +133,7 @@
   DCHECK(IsObsolete());
   const DexFile* dex_file = GetDexFile();
   const dex::TypeIndex declaring_class_type = dex_file->GetMethodId(GetDexMethodIndex()).class_idx_;
-  const DexFile::ClassDef* class_def = dex_file->FindClassDef(declaring_class_type);
+  const dex::ClassDef* class_def = dex_file->FindClassDef(declaring_class_type);
   CHECK(class_def != nullptr);
   return dex_file->GetIndexForClassDef(*class_def);
 }
@@ -182,13 +182,13 @@
 bool ArtMethod::HasSameNameAndSignature(ArtMethod* other) {
   ScopedAssertNoThreadSuspension ants("HasSameNameAndSignature");
   const DexFile* dex_file = GetDexFile();
-  const DexFile::MethodId& mid = dex_file->GetMethodId(GetDexMethodIndex());
+  const dex::MethodId& mid = dex_file->GetMethodId(GetDexMethodIndex());
   if (GetDexCache() == other->GetDexCache()) {
-    const DexFile::MethodId& mid2 = dex_file->GetMethodId(other->GetDexMethodIndex());
+    const dex::MethodId& mid2 = dex_file->GetMethodId(other->GetDexMethodIndex());
     return mid.name_idx_ == mid2.name_idx_ && mid.proto_idx_ == mid2.proto_idx_;
   }
   const DexFile* dex_file2 = other->GetDexFile();
-  const DexFile::MethodId& mid2 = dex_file2->GetMethodId(other->GetDexMethodIndex());
+  const dex::MethodId& mid2 = dex_file2->GetMethodId(other->GetDexMethodIndex());
   if (!DexFileStringEquals(dex_file, mid.name_idx_, dex_file2, mid2.name_idx_)) {
     return false;  // Name mismatch.
   }
@@ -235,17 +235,17 @@
                                                      uint32_t name_and_signature_idx) {
   const DexFile* dexfile = GetDexFile();
   const uint32_t dex_method_idx = GetDexMethodIndex();
-  const DexFile::MethodId& mid = dexfile->GetMethodId(dex_method_idx);
-  const DexFile::MethodId& name_and_sig_mid = other_dexfile.GetMethodId(name_and_signature_idx);
+  const dex::MethodId& mid = dexfile->GetMethodId(dex_method_idx);
+  const dex::MethodId& name_and_sig_mid = other_dexfile.GetMethodId(name_and_signature_idx);
   DCHECK_STREQ(dexfile->GetMethodName(mid), other_dexfile.GetMethodName(name_and_sig_mid));
   DCHECK_EQ(dexfile->GetMethodSignature(mid), other_dexfile.GetMethodSignature(name_and_sig_mid));
   if (dexfile == &other_dexfile) {
     return dex_method_idx;
   }
   const char* mid_declaring_class_descriptor = dexfile->StringByTypeIdx(mid.class_idx_);
-  const DexFile::TypeId* other_type_id = other_dexfile.FindTypeId(mid_declaring_class_descriptor);
+  const dex::TypeId* other_type_id = other_dexfile.FindTypeId(mid_declaring_class_descriptor);
   if (other_type_id != nullptr) {
-    const DexFile::MethodId* other_mid = other_dexfile.FindMethodId(
+    const dex::MethodId* other_mid = other_dexfile.FindMethodId(
         *other_type_id, other_dexfile.GetStringId(name_and_sig_mid.name_idx_),
         other_dexfile.GetProtoId(name_and_sig_mid.proto_idx_));
     if (other_mid != nullptr) {
@@ -447,11 +447,11 @@
 
   // recreate the class_def_index from the descriptor.
   std::string descriptor_storage;
-  const DexFile::TypeId* declaring_class_type_id =
+  const dex::TypeId* declaring_class_type_id =
       dex_file->FindTypeId(method->GetDeclaringClass()->GetDescriptor(&descriptor_storage));
   CHECK(declaring_class_type_id != nullptr);
   dex::TypeIndex declaring_class_type_index = dex_file->GetIndexForTypeId(*declaring_class_type_id);
-  const DexFile::ClassDef* declaring_class_type_def =
+  const dex::ClassDef* declaring_class_type_def =
       dex_file->FindClassDef(declaring_class_type_index);
   CHECK(declaring_class_type_def != nullptr);
   uint16_t declaring_class_def_index = dex_file->GetIndexForClassDef(*declaring_class_type_def);
@@ -522,7 +522,7 @@
   auto* dex_file = dex_cache->GetDexFile();
   const auto& method_id = dex_file->GetMethodId(GetDexMethodIndex());
   const auto& proto_id = dex_file->GetMethodPrototype(method_id);
-  const DexFile::TypeList* proto_params = dex_file->GetProtoParameters(proto_id);
+  const dex::TypeList* proto_params = dex_file->GetProtoParameters(proto_id);
   auto count = proto_params != nullptr ? proto_params->Size() : 0u;
   auto param_len = params != nullptr ? params->GetLength() : 0u;
   if (param_len != count) {
diff --git a/runtime/art_method.h b/runtime/art_method.h
index cc214f7..6b598da 100644
--- a/runtime/art_method.h
+++ b/runtime/art_method.h
@@ -29,7 +29,7 @@
 #include "base/macros.h"
 #include "base/runtime_debug.h"
 #include "dex/code_item_accessors.h"
-#include "dex/dex_file.h"
+#include "dex/dex_file_structs.h"
 #include "dex/dex_instruction_iterator.h"
 #include "dex/modifiers.h"
 #include "dex/primitive.h"
@@ -40,6 +40,7 @@
 
 namespace art {
 
+class DexFile;
 template<class T> class Handle;
 class ImtConflictTable;
 enum InvokeType : uint32_t;
@@ -586,21 +587,21 @@
 
   ObjPtr<mirror::String> ResolveNameString() REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::CodeItem* GetCodeItem() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::CodeItem* GetCodeItem() REQUIRES_SHARED(Locks::mutator_lock_);
 
   bool IsResolvedTypeIdx(dex::TypeIndex type_idx) REQUIRES_SHARED(Locks::mutator_lock_);
 
   int32_t GetLineNumFromDexPC(uint32_t dex_pc) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::ProtoId& GetPrototype() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::ProtoId& GetPrototype() REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::TypeList* GetParameterTypeList() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::TypeList* GetParameterTypeList() REQUIRES_SHARED(Locks::mutator_lock_);
 
   const char* GetDeclaringClassSourceFile() REQUIRES_SHARED(Locks::mutator_lock_);
 
   uint16_t GetClassDefIndex() REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::ClassDef& GetClassDef() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::ClassDef& GetClassDef() REQUIRES_SHARED(Locks::mutator_lock_);
 
   ALWAYS_INLINE size_t GetNumberOfParameters() REQUIRES_SHARED(Locks::mutator_lock_);
 
diff --git a/runtime/class_linker-inl.h b/runtime/class_linker-inl.h
index 43f3ed3..978b1ab 100644
--- a/runtime/class_linker-inl.h
+++ b/runtime/class_linker-inl.h
@@ -23,6 +23,8 @@
 #include "art_method-inl.h"
 #include "base/mutex.h"
 #include "class_linker.h"
+#include "dex/dex_file.h"
+#include "dex/dex_file_structs.h"
 #include "gc_root-inl.h"
 #include "handle_scope-inl.h"
 #include "mirror/class_loader.h"
@@ -271,7 +273,7 @@
       dex_cache,
       type,
       [this, dex_cache, method_idx, class_loader]() REQUIRES_SHARED(Locks::mutator_lock_) {
-        const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(method_idx);
+        const dex::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(method_idx);
         ObjPtr<mirror::Class> klass =
             LookupResolvedType(method_id.class_idx_, dex_cache, class_loader);
         DCHECK(klass != nullptr);
@@ -286,7 +288,7 @@
   ArtMethod* resolved = dex_cache->GetResolvedMethod(method_idx, pointer_size);
   if (resolved == nullptr) {
     const DexFile& dex_file = *dex_cache->GetDexFile();
-    const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
+    const dex::MethodId& method_id = dex_file.GetMethodId(method_idx);
     ObjPtr<mirror::Class> klass = LookupResolvedType(method_id.class_idx_, dex_cache, class_loader);
     if (klass != nullptr) {
       resolved = FindResolvedMethod(klass, dex_cache, class_loader, method_idx);
diff --git a/runtime/class_linker.cc b/runtime/class_linker.cc
index 3b92e2c..c22a5cb 100644
--- a/runtime/class_linker.cc
+++ b/runtime/class_linker.cc
@@ -2628,13 +2628,13 @@
   return klass;
 }
 
-using ClassPathEntry = std::pair<const DexFile*, const DexFile::ClassDef*>;
+using ClassPathEntry = std::pair<const DexFile*, const dex::ClassDef*>;
 
 // Search a collection of DexFiles for a descriptor
 ClassPathEntry FindInClassPath(const char* descriptor,
                                size_t hash, const std::vector<const DexFile*>& class_path) {
   for (const DexFile* dex_file : class_path) {
-    const DexFile::ClassDef* dex_class_def = OatDexFile::FindClassDef(*dex_file, descriptor, hash);
+    const dex::ClassDef* dex_class_def = OatDexFile::FindClassDef(*dex_file, descriptor, hash);
     if (dex_class_def != nullptr) {
       return ClassPathEntry(dex_file, dex_class_def);
     }
@@ -2784,8 +2784,7 @@
 
   ObjPtr<mirror::Class> ret;
   auto define_class = [&](const DexFile* cp_dex_file) REQUIRES_SHARED(Locks::mutator_lock_) {
-    const DexFile::ClassDef* dex_class_def =
-        OatDexFile::FindClassDef(*cp_dex_file, descriptor, hash);
+    const dex::ClassDef* dex_class_def = OatDexFile::FindClassDef(*cp_dex_file, descriptor, hash);
     if (dex_class_def != nullptr) {
       ObjPtr<mirror::Class> klass = DefineClass(soa.Self(),
                                                 descriptor,
@@ -2985,7 +2984,7 @@
                                                size_t hash,
                                                Handle<mirror::ClassLoader> class_loader,
                                                const DexFile& dex_file,
-                                               const DexFile::ClassDef& dex_class_def) {
+                                               const dex::ClassDef& dex_class_def) {
   StackHandleScope<3> hs(self);
   auto klass = hs.NewHandle<mirror::Class>(nullptr);
 
@@ -3032,7 +3031,7 @@
   // Get the real dex file. This will return the input if there aren't any callbacks or they do
   // nothing.
   DexFile const* new_dex_file = nullptr;
-  DexFile::ClassDef const* new_class_def = nullptr;
+  dex::ClassDef const* new_class_def = nullptr;
   // TODO We should ideally figure out some way to move this after we get a lock on the klass so it
   // will only be called once.
   Runtime::Current()->GetRuntimeCallbacks()->ClassPreDefine(descriptor,
@@ -3153,7 +3152,7 @@
 }
 
 uint32_t ClassLinker::SizeOfClassWithoutEmbeddedTables(const DexFile& dex_file,
-                                                       const DexFile::ClassDef& dex_class_def) {
+                                                       const dex::ClassDef& dex_class_def) {
   size_t num_ref = 0;
   size_t num_8 = 0;
   size_t num_16 = 0;
@@ -3171,7 +3170,7 @@
       continue;
     }
     last_field_idx = field_idx;
-    const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+    const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
     const char* descriptor = dex_file.GetFieldTypeDescriptor(field_id);
     char c = descriptor[0];
     switch (c) {
@@ -3400,7 +3399,7 @@
 }
 
 void ClassLinker::SetupClass(const DexFile& dex_file,
-                             const DexFile::ClassDef& dex_class_def,
+                             const dex::ClassDef& dex_class_def,
                              Handle<mirror::Class> klass,
                              ObjPtr<mirror::ClassLoader> class_loader) {
   CHECK(klass != nullptr);
@@ -3481,7 +3480,7 @@
 
 void ClassLinker::LoadClass(Thread* self,
                             const DexFile& dex_file,
-                            const DexFile::ClassDef& dex_class_def,
+                            const dex::ClassDef& dex_class_def,
                             Handle<mirror::Class> klass) {
   ClassAccessor accessor(dex_file,
                          dex_class_def,
@@ -3606,7 +3605,7 @@
                              Handle<mirror::Class> klass,
                              ArtMethod* dst) {
   const uint32_t dex_method_idx = method.GetIndex();
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
+  const dex::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
   const char* method_name = dex_file.StringDataByIdx(method_id.name_idx_);
 
   ScopedAssertNoThreadSuspension ants("LoadMethod");
@@ -4987,7 +4986,7 @@
     }
     // Check if there are encoded static values needing initialization.
     if (klass->NumStaticFields() != 0) {
-      const DexFile::ClassDef* dex_class_def = klass->GetClassDef();
+      const dex::ClassDef* dex_class_def = klass->GetClassDef();
       DCHECK(dex_class_def != nullptr);
       if (dex_class_def->static_values_off_ != 0) {
         return false;
@@ -5204,7 +5203,7 @@
 
   const size_t num_static_fields = klass->NumStaticFields();
   if (num_static_fields > 0) {
-    const DexFile::ClassDef* dex_class_def = klass->GetClassDef();
+    const dex::ClassDef* dex_class_def = klass->GetClassDef();
     CHECK(dex_class_def != nullptr);
     StackHandleScope<3> hs(self);
     Handle<mirror::ClassLoader> class_loader(hs.NewHandle(klass->GetClassLoader()));
@@ -5413,8 +5412,8 @@
   DCHECK(Thread::Current()->IsExceptionPending());
   DCHECK(!m->IsProxyMethod());
   const DexFile* dex_file = m->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file->GetMethodId(m->GetDexMethodIndex());
-  const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
+  const dex::MethodId& method_id = dex_file->GetMethodId(m->GetDexMethodIndex());
+  const dex::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
   dex::TypeIndex return_type_idx = proto_id.return_type_idx_;
   std::string return_type = dex_file->PrettyType(return_type_idx);
   std::string class_loader = mirror::Object::PrettyTypeOf(m->GetDeclaringClass()->GetClassLoader());
@@ -5492,8 +5491,8 @@
       return false;
     }
   }
-  const DexFile::TypeList* types1 = method1->GetParameterTypeList();
-  const DexFile::TypeList* types2 = method2->GetParameterTypeList();
+  const dex::TypeList* types1 = method1->GetParameterTypeList();
+  const dex::TypeList* types2 = method2->GetParameterTypeList();
   if (types1 == nullptr) {
     if (types2 != nullptr && types2->Size() != 0) {
       ThrowSignatureMismatch(klass, super_klass, method1,
@@ -5852,7 +5851,7 @@
 
 bool ClassLinker::LoadSuperAndInterfaces(Handle<mirror::Class> klass, const DexFile& dex_file) {
   CHECK_EQ(ClassStatus::kIdx, klass->GetStatus());
-  const DexFile::ClassDef& class_def = dex_file.GetClassDef(klass->GetDexClassDefIndex());
+  const dex::ClassDef& class_def = dex_file.GetClassDef(klass->GetDexClassDefIndex());
   dex::TypeIndex super_class_idx = class_def.superclass_idx_;
   if (super_class_idx.IsValid()) {
     // Check that a class does not inherit from itself directly.
@@ -5883,7 +5882,7 @@
     CHECK(super_class->IsResolved());
     klass->SetSuperClass(super_class);
   }
-  const DexFile::TypeList* interfaces = dex_file.GetInterfacesList(class_def);
+  const dex::TypeList* interfaces = dex_file.GetInterfacesList(class_def);
   if (interfaces != nullptr) {
     for (size_t i = 0; i < interfaces->Size(); i++) {
       dex::TypeIndex idx = interfaces->GetTypeItem(i).type_idx_;
@@ -6027,7 +6026,7 @@
       REQUIRES_SHARED(Locks::mutator_lock_) {
     DCHECK(!other->IsProxyMethod()) << other->PrettyMethod();
     const DexFile* other_dex_file = other->GetDexFile();
-    const DexFile::MethodId& other_mid = other_dex_file->GetMethodId(other->GetDexMethodIndex());
+    const dex::MethodId& other_mid = other_dex_file->GetMethodId(other->GetDexMethodIndex());
     if (dex_file_ == other_dex_file) {
       return mid_->name_idx_ == other_mid.name_idx_ && mid_->proto_idx_ == other_mid.proto_idx_;
     }
@@ -6045,7 +6044,7 @@
   // Dex file for the method to compare against.
   const DexFile* const dex_file_;
   // MethodId for the method to compare against.
-  const DexFile::MethodId* const mid_;
+  const dex::MethodId* const mid_;
   // Lazily computed name from the dex file's strings.
   const char* name_;
   // Lazily computed name length.
@@ -8336,7 +8335,7 @@
     return resolved;
   }
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(method_idx);
+  const dex::MethodId& method_id = dex_file.GetMethodId(method_idx);
   ObjPtr<mirror::Class> klass = nullptr;
   if (valid_dex_cache_method) {
     // We have a valid method from the DexCache but we need to perform ICCE and IAE checks.
@@ -8417,7 +8416,7 @@
     return resolved;
   }
   // Fail, get the declaring class.
-  const DexFile::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(method_idx);
+  const dex::MethodId& method_id = dex_cache->GetDexFile()->GetMethodId(method_idx);
   ObjPtr<mirror::Class> klass = ResolveType(method_id.class_idx_, dex_cache, class_loader);
   if (klass == nullptr) {
     Thread::Current()->AssertPendingException();
@@ -8443,7 +8442,7 @@
                                            ObjPtr<mirror::ClassLoader> class_loader,
                                            bool is_static) {
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
   ObjPtr<mirror::Class> klass = dex_cache->GetResolvedType(field_id.class_idx_);
   if (klass == nullptr) {
     klass = LookupResolvedType(field_id.class_idx_, dex_cache, class_loader);
@@ -8468,7 +8467,7 @@
     return resolved;
   }
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
   ObjPtr<mirror::Class> klass = ResolveType(field_id.class_idx_, dex_cache, class_loader);
   if (klass == nullptr) {
     DCHECK(Thread::Current()->IsExceptionPending());
@@ -8494,7 +8493,7 @@
     return resolved;
   }
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
   ObjPtr<mirror::Class> klass = ResolveType(field_id.class_idx_, dex_cache, class_loader);
   if (klass == nullptr) {
     DCHECK(Thread::Current()->IsExceptionPending());
@@ -8523,7 +8522,7 @@
                        : klass->FindInstanceField(dex_cache, field_idx);
 
   if (resolved == nullptr) {
-    const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+    const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
     const char* name = dex_file.GetFieldName(field_id);
     const char* type = dex_file.GetFieldTypeDescriptor(field_id);
     resolved = is_static ? mirror::Class::FindStaticField(self, klass, name, type)
@@ -8551,7 +8550,7 @@
   ArtField* resolved = nullptr;
   Thread* self = Thread::Current();
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file.GetFieldId(field_idx);
 
   const char* name = dex_file.GetFieldName(field_id);
   const char* type = dex_file.GetFieldTypeDescriptor(field_id);
@@ -8588,7 +8587,7 @@
 
   // First resolve the return type.
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::ProtoId& proto_id = dex_file.GetProtoId(proto_idx);
+  const dex::ProtoId& proto_id = dex_file.GetProtoId(proto_idx);
   Handle<mirror::Class> return_type(hs.NewHandle(
       ResolveType(proto_id.return_type_idx_, dex_cache, class_loader)));
   if (return_type == nullptr) {
@@ -8644,7 +8643,7 @@
 
 mirror::MethodHandle* ClassLinker::ResolveMethodHandleForField(
     Thread* self,
-    const DexFile::MethodHandleItem& method_handle,
+    const dex::MethodHandleItem& method_handle,
     ArtMethod* referrer) {
   DexFile::MethodHandleType handle_type =
       static_cast<DexFile::MethodHandleType>(method_handle.method_handle_type_);
@@ -8772,7 +8771,7 @@
 
 mirror::MethodHandle* ClassLinker::ResolveMethodHandleForMethod(
     Thread* self,
-    const DexFile::MethodHandleItem& method_handle,
+    const dex::MethodHandleItem& method_handle,
     ArtMethod* referrer) {
   DexFile::MethodHandleType handle_type =
       static_cast<DexFile::MethodHandleType>(method_handle.method_handle_type_);
@@ -8895,7 +8894,7 @@
   }
 
   const DexFile* dex_file = referrer->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file->GetMethodId(method_handle.field_or_method_idx_);
+  const dex::MethodId& method_id = dex_file->GetMethodId(method_handle.field_or_method_idx_);
   int32_t index = 0;
   if (receiver_count != 0) {
     // Insert receiver. Use the class identified in the method handle rather than the declaring
@@ -8907,7 +8906,7 @@
     method_params->Set(index++, receiver_class);
   }
 
-  const DexFile::ProtoId& proto_id = dex_file->GetProtoId(method_id.proto_idx_);
+  const dex::ProtoId& proto_id = dex_file->GetProtoId(method_id.proto_idx_);
   DexFileParameterIterator it(*dex_file, proto_id);
   while (it.HasNext()) {
     DCHECK_LT(index, num_params);
@@ -8951,7 +8950,7 @@
                                                               ArtMethod* referrer)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile* const dex_file = referrer->GetDexFile();
-  const DexFile::MethodHandleItem& method_handle = dex_file->GetMethodHandle(method_handle_idx);
+  const dex::MethodHandleItem& method_handle = dex_file->GetMethodHandle(method_handle_idx);
   switch (static_cast<DexFile::MethodHandleType>(method_handle.method_handle_type_)) {
     case DexFile::MethodHandleType::kStaticPut:
     case DexFile::MethodHandleType::kStaticGet:
diff --git a/runtime/class_linker.h b/runtime/class_linker.h
index d0a7c9b..fa5df44 100644
--- a/runtime/class_linker.h
+++ b/runtime/class_linker.h
@@ -29,7 +29,6 @@
 #include "base/macros.h"
 #include "dex/class_accessor.h"
 #include "dex/dex_cache_resolved_classes.h"
-#include "dex/dex_file.h"
 #include "dex/dex_file_types.h"
 #include "gc_root.h"
 #include "handle.h"
@@ -39,6 +38,10 @@
 
 namespace art {
 
+namespace dex {
+struct ClassDef;
+}  // namespace dex
+
 namespace gc {
 namespace space {
 class ImageSpace;
@@ -73,6 +76,7 @@
 class ClassHierarchyAnalysis;
 enum class ClassRoot : uint32_t;
 class ClassTable;
+class DexFile;
 template<class T> class Handle;
 class ImtConflictTable;
 template<typename T> class LengthPrefixedArray;
@@ -185,7 +189,7 @@
                                     size_t hash,
                                     Handle<mirror::ClassLoader> class_loader,
                                     const DexFile& dex_file,
-                                    const DexFile::ClassDef& dex_class_def)
+                                    const dex::ClassDef& dex_class_def)
       REQUIRES_SHARED(Locks::mutator_lock_)
       REQUIRES(!Locks::dex_lock_);
 
@@ -844,19 +848,19 @@
   // Precomputes size needed for Class, in the case of a non-temporary class this size must be
   // sufficient to hold all static fields.
   uint32_t SizeOfClassWithoutEmbeddedTables(const DexFile& dex_file,
-                                            const DexFile::ClassDef& dex_class_def);
+                                            const dex::ClassDef& dex_class_def);
 
   // Setup the classloader, class def index, type idx so that we can insert this class in the class
   // table.
   void SetupClass(const DexFile& dex_file,
-                  const DexFile::ClassDef& dex_class_def,
+                  const dex::ClassDef& dex_class_def,
                   Handle<mirror::Class> klass,
                   ObjPtr<mirror::ClassLoader> class_loader)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   void LoadClass(Thread* self,
                  const DexFile& dex_file,
-                 const DexFile::ClassDef& dex_class_def,
+                 const dex::ClassDef& dex_class_def,
                  Handle<mirror::Class> klass)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -1028,12 +1032,12 @@
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   mirror::MethodHandle* ResolveMethodHandleForField(Thread* self,
-                                                    const DexFile::MethodHandleItem& method_handle,
+                                                    const dex::MethodHandleItem& method_handle,
                                                     ArtMethod* referrer)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   mirror::MethodHandle* ResolveMethodHandleForMethod(Thread* self,
-                                                     const DexFile::MethodHandleItem& method_handle,
+                                                     const dex::MethodHandleItem& method_handle,
                                                      ArtMethod* referrer)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -1403,9 +1407,9 @@
                               Handle<mirror::Class> klass ATTRIBUTE_UNUSED,
                               Handle<mirror::ClassLoader> class_loader ATTRIBUTE_UNUSED,
                               const DexFile& initial_dex_file ATTRIBUTE_UNUSED,
-                              const DexFile::ClassDef& initial_class_def ATTRIBUTE_UNUSED,
+                              const dex::ClassDef& initial_class_def ATTRIBUTE_UNUSED,
                               /*out*/DexFile const** final_dex_file ATTRIBUTE_UNUSED,
-                              /*out*/DexFile::ClassDef const** final_class_def ATTRIBUTE_UNUSED)
+                              /*out*/dex::ClassDef const** final_class_def ATTRIBUTE_UNUSED)
       REQUIRES_SHARED(Locks::mutator_lock_) {}
 
   // A class has been loaded.
diff --git a/runtime/class_linker_test.cc b/runtime/class_linker_test.cc
index 061c788..f3aefc2 100644
--- a/runtime/class_linker_test.cc
+++ b/runtime/class_linker_test.cc
@@ -429,13 +429,13 @@
       REQUIRES_SHARED(Locks::mutator_lock_) {
     // Verify all the classes defined in this file
     for (size_t i = 0; i < dex.NumClassDefs(); i++) {
-      const DexFile::ClassDef& class_def = dex.GetClassDef(i);
+      const dex::ClassDef& class_def = dex.GetClassDef(i);
       const char* descriptor = dex.GetClassDescriptor(class_def);
       AssertDexFileClass(class_loader, descriptor);
     }
     // Verify all the types referenced by this file
     for (size_t i = 0; i < dex.NumTypeIds(); i++) {
-      const DexFile::TypeId& type_id = dex.GetTypeId(dex::TypeIndex(i));
+      const dex::TypeId& type_id = dex.GetTypeId(dex::TypeIndex(i));
       const char* descriptor = dex.GetTypeDescriptor(type_id);
       AssertDexFileClass(class_loader, descriptor);
     }
@@ -997,7 +997,7 @@
   Handle<mirror::DexCache> dex_cache = hs.NewHandle(all_fields_klass->GetDexCache());
   const DexFile& dex_file = *dex_cache->GetDexFile();
   // Get the index of the array class we want to test.
-  const DexFile::TypeId* array_id = dex_file.FindTypeId("[Ljava/lang/Object;");
+  const dex::TypeId* array_id = dex_file.FindTypeId("[Ljava/lang/Object;");
   ASSERT_TRUE(array_id != nullptr);
   dex::TypeIndex array_idx = dex_file.GetIndexForTypeId(*array_id);
   // Check that the array class wasn't resolved yet.
@@ -1323,7 +1323,7 @@
       klass->FindClassMethod("getS0", "()Ljava/lang/Object;", kRuntimePointerSize);
   ASSERT_TRUE(getS0 != nullptr);
   ASSERT_TRUE(getS0->IsStatic());
-  const DexFile::TypeId* type_id = dex_file->FindTypeId("LStaticsFromCode;");
+  const dex::TypeId* type_id = dex_file->FindTypeId("LStaticsFromCode;");
   ASSERT_TRUE(type_id != nullptr);
   dex::TypeIndex type_idx = dex_file->GetIndexForTypeId(*type_id);
   ObjPtr<mirror::Class> uninit = ResolveVerifyAndClinit(type_idx,
@@ -1564,7 +1564,7 @@
   Handle<mirror::DexCache> dex_cache = hs.NewHandle(
       class_linker_->FindDexCache(soa.Self(), dex_file));
 
-  const DexFile::MethodId& method1_id = dex_file.GetMethodId(method1->GetDexMethodIndex());
+  const dex::MethodId& method1_id = dex_file.GetMethodId(method1->GetDexMethodIndex());
 
   // This is the MethodType corresponding to the prototype of
   // String MethodTypes# method1(String).
@@ -1596,7 +1596,7 @@
       kRuntimePointerSize);
   ASSERT_TRUE(method2 != nullptr);
   ASSERT_FALSE(method2->IsDirect());
-  const DexFile::MethodId& method2_id = dex_file.GetMethodId(method2->GetDexMethodIndex());
+  const dex::MethodId& method2_id = dex_file.GetMethodId(method2->GetDexMethodIndex());
   Handle<mirror::MethodType> method2_type = hs.NewHandle(
       class_linker_->ResolveMethodType(soa.Self(), method2_id.proto_idx_, dex_cache, class_loader));
   ASSERT_OBJ_PTR_NE(method1_type.Get(), method2_type.Get());
diff --git a/runtime/common_dex_operations.h b/runtime/common_dex_operations.h
index 5c5431d..1c95622 100644
--- a/runtime/common_dex_operations.h
+++ b/runtime/common_dex_operations.h
@@ -24,6 +24,7 @@
 #include "base/macros.h"
 #include "class_linker.h"
 #include "dex/code_item_accessors.h"
+#include "dex/dex_file_structs.h"
 #include "dex/primitive.h"
 #include "handle_scope-inl.h"
 #include "instrumentation.h"
@@ -42,7 +43,7 @@
 
 namespace interpreter {
   void ArtInterpreterToInterpreterBridge(Thread* self,
-                                        const DexFile::CodeItem* code_item,
+                                        const dex::CodeItem* code_item,
                                         ShadowFrame* shadow_frame,
                                         JValue* result)
      REQUIRES_SHARED(Locks::mutator_lock_);
diff --git a/runtime/debugger.cc b/runtime/debugger.cc
index 80140b3..adf01c3 100644
--- a/runtime/debugger.cc
+++ b/runtime/debugger.cc
@@ -3927,7 +3927,7 @@
       StackHandleScope<2> hs(soa.Self());
       HandleWrapper<mirror::Object> h_obj(hs.NewHandleWrapper(&receiver));
       HandleWrapper<mirror::Class> h_klass(hs.NewHandleWrapper(&c));
-      const DexFile::TypeList* types = m->GetParameterTypeList();
+      const dex::TypeList* types = m->GetParameterTypeList();
       for (size_t i = 0; i < arg_count; ++i) {
         if (shorty[i + 1] != JdwpTagToShortyChar(arg_types[i])) {
           return JDWP::ERR_ILLEGAL_ARGUMENT;
diff --git a/runtime/dex/dex_file_annotations.cc b/runtime/dex/dex_file_annotations.cc
index 9127a27..e75baf8 100644
--- a/runtime/dex/dex_file_annotations.cc
+++ b/runtime/dex/dex_file_annotations.cc
@@ -44,6 +44,15 @@
 
 using android::base::StringPrintf;
 
+using dex::AnnotationItem;
+using dex::AnnotationSetItem;
+using dex::AnnotationSetRefItem;
+using dex::AnnotationSetRefList;
+using dex::AnnotationsDirectoryItem;
+using dex::FieldAnnotationsItem;
+using dex::MethodAnnotationsItem;
+using dex::ParameterAnnotationsItem;
+
 struct DexFile::AnnotationValue {
   JValue value_;
   uint8_t type_;
@@ -75,7 +84,7 @@
     return dex_file_;
   }
 
-  const DexFile::ClassDef* GetClassDef() const REQUIRES_SHARED(Locks::mutator_lock_) {
+  const dex::ClassDef* GetClassDef() const REQUIRES_SHARED(Locks::mutator_lock_) {
     return class_def_;
   }
 
@@ -107,7 +116,7 @@
   ClassData(Handle<mirror::Class> klass,
             ArtMethod* method,
             const DexFile& dex_file,
-            const DexFile::ClassDef* class_def) REQUIRES_SHARED(Locks::mutator_lock_)
+            const dex::ClassDef* class_def) REQUIRES_SHARED(Locks::mutator_lock_)
       : real_klass_(klass),
         method_(method),
         dex_file_(dex_file),
@@ -118,7 +127,7 @@
   Handle<mirror::Class> real_klass_;
   ArtMethod* method_;
   const DexFile& dex_file_;
-  const DexFile::ClassDef* class_def_;
+  const dex::ClassDef* class_def_;
 
   DISALLOW_COPY_AND_ASSIGN(ClassData);
 };
@@ -137,21 +146,20 @@
   return actual == expected;
 }
 
-const DexFile::AnnotationSetItem* FindAnnotationSetForField(ArtField* field)
+const AnnotationSetItem* FindAnnotationSetForField(ArtField* field)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile* dex_file = field->GetDexFile();
   ObjPtr<mirror::Class> klass = field->GetDeclaringClass();
-  const DexFile::ClassDef* class_def = klass->GetClassDef();
+  const dex::ClassDef* class_def = klass->GetClassDef();
   if (class_def == nullptr) {
     DCHECK(klass->IsProxyClass());
     return nullptr;
   }
-  const DexFile::AnnotationsDirectoryItem* annotations_dir =
-      dex_file->GetAnnotationsDirectory(*class_def);
+  const AnnotationsDirectoryItem* annotations_dir = dex_file->GetAnnotationsDirectory(*class_def);
   if (annotations_dir == nullptr) {
     return nullptr;
   }
-  const DexFile::FieldAnnotationsItem* field_annotations =
+  const FieldAnnotationsItem* field_annotations =
       dex_file->GetFieldAnnotations(annotations_dir);
   if (field_annotations == nullptr) {
     return nullptr;
@@ -166,14 +174,14 @@
   return nullptr;
 }
 
-const DexFile::AnnotationItem* SearchAnnotationSet(const DexFile& dex_file,
-                                                   const DexFile::AnnotationSetItem* annotation_set,
-                                                   const char* descriptor,
-                                                   uint32_t visibility)
+const AnnotationItem* SearchAnnotationSet(const DexFile& dex_file,
+                                          const AnnotationSetItem* annotation_set,
+                                          const char* descriptor,
+                                          uint32_t visibility)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::AnnotationItem* result = nullptr;
+  const AnnotationItem* result = nullptr;
   for (uint32_t i = 0; i < annotation_set->size_; ++i) {
-    const DexFile::AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
+    const AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
     if (!IsVisibilityCompatible(annotation_item->visibility_, visibility)) {
       continue;
     }
@@ -268,16 +276,14 @@
   return nullptr;
 }
 
-const DexFile::AnnotationSetItem* FindAnnotationSetForMethod(const DexFile& dex_file,
-                                                             const DexFile::ClassDef& class_def,
-                                                             uint32_t method_index) {
-  const DexFile::AnnotationsDirectoryItem* annotations_dir =
-      dex_file.GetAnnotationsDirectory(class_def);
+const AnnotationSetItem* FindAnnotationSetForMethod(const DexFile& dex_file,
+                                                    const dex::ClassDef& class_def,
+                                                    uint32_t method_index) {
+  const AnnotationsDirectoryItem* annotations_dir = dex_file.GetAnnotationsDirectory(class_def);
   if (annotations_dir == nullptr) {
     return nullptr;
   }
-  const DexFile::MethodAnnotationsItem* method_annotations =
-      dex_file.GetMethodAnnotations(annotations_dir);
+  const MethodAnnotationsItem* method_annotations = dex_file.GetMethodAnnotations(annotations_dir);
   if (method_annotations == nullptr) {
     return nullptr;
   }
@@ -290,7 +296,7 @@
   return nullptr;
 }
 
-inline const DexFile::AnnotationSetItem* FindAnnotationSetForMethod(ArtMethod* method)
+inline const AnnotationSetItem* FindAnnotationSetForMethod(ArtMethod* method)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   if (method->IsProxyMethod()) {
     return nullptr;
@@ -300,15 +306,15 @@
                                     method->GetDexMethodIndex());
 }
 
-const DexFile::ParameterAnnotationsItem* FindAnnotationsItemForMethod(ArtMethod* method)
+const ParameterAnnotationsItem* FindAnnotationsItemForMethod(ArtMethod* method)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile* dex_file = method->GetDexFile();
-  const DexFile::AnnotationsDirectoryItem* annotations_dir =
+  const AnnotationsDirectoryItem* annotations_dir =
       dex_file->GetAnnotationsDirectory(method->GetClassDef());
   if (annotations_dir == nullptr) {
     return nullptr;
   }
-  const DexFile::ParameterAnnotationsItem* parameter_annotations =
+  const ParameterAnnotationsItem* parameter_annotations =
       dex_file->GetParameterAnnotations(annotations_dir);
   if (parameter_annotations == nullptr) {
     return nullptr;
@@ -323,16 +329,15 @@
   return nullptr;
 }
 
-const DexFile::AnnotationSetItem* FindAnnotationSetForClass(const ClassData& klass)
+const AnnotationSetItem* FindAnnotationSetForClass(const ClassData& klass)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
-  const DexFile::ClassDef* class_def = klass.GetClassDef();
+  const dex::ClassDef* class_def = klass.GetClassDef();
   if (class_def == nullptr) {
     DCHECK(klass.GetRealClass()->IsProxyClass());
     return nullptr;
   }
-  const DexFile::AnnotationsDirectoryItem* annotations_dir =
-      dex_file.GetAnnotationsDirectory(*class_def);
+  const AnnotationsDirectoryItem* annotations_dir = dex_file.GetAnnotationsDirectory(*class_def);
   if (annotations_dir == nullptr) {
     return nullptr;
   }
@@ -768,15 +773,14 @@
   return new_member.Get();
 }
 
-const DexFile::AnnotationItem* GetAnnotationItemFromAnnotationSet(
-    const ClassData& klass,
-    const DexFile::AnnotationSetItem* annotation_set,
-    uint32_t visibility,
-    Handle<mirror::Class> annotation_class)
+const AnnotationItem* GetAnnotationItemFromAnnotationSet(const ClassData& klass,
+                                                         const AnnotationSetItem* annotation_set,
+                                                         uint32_t visibility,
+                                                         Handle<mirror::Class> annotation_class)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
   for (uint32_t i = 0; i < annotation_set->size_; ++i) {
-    const DexFile::AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
+    const AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
     if (!IsVisibilityCompatible(annotation_item->visibility_, visibility)) {
       continue;
     }
@@ -805,13 +809,12 @@
   return nullptr;
 }
 
-ObjPtr<mirror::Object> GetAnnotationObjectFromAnnotationSet(
-    const ClassData& klass,
-    const DexFile::AnnotationSetItem* annotation_set,
-    uint32_t visibility,
-    Handle<mirror::Class> annotation_class)
+ObjPtr<mirror::Object> GetAnnotationObjectFromAnnotationSet(const ClassData& klass,
+                                                            const AnnotationSetItem* annotation_set,
+                                                            uint32_t visibility,
+                                                            Handle<mirror::Class> annotation_class)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
+  const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
       klass, annotation_set, visibility, annotation_class);
   if (annotation_item == nullptr) {
     return nullptr;
@@ -821,7 +824,7 @@
 }
 
 ObjPtr<mirror::Object> GetAnnotationValue(const ClassData& klass,
-                                          const DexFile::AnnotationItem* annotation_item,
+                                          const AnnotationItem* annotation_item,
                                           const char* annotation_name,
                                           Handle<mirror::Class> array_class,
                                           uint32_t expected_type)
@@ -855,11 +858,11 @@
 
 static ObjPtr<mirror::ObjectArray<mirror::String>> GetSignatureValue(
     const ClassData& klass,
-    const DexFile::AnnotationSetItem* annotation_set)
+    const AnnotationSetItem* annotation_set)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
   StackHandleScope<1> hs(Thread::Current());
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(dex_file, annotation_set, "Ldalvik/annotation/Signature;",
                           DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
@@ -877,12 +880,11 @@
   return obj->AsObjectArray<mirror::String>();
 }
 
-ObjPtr<mirror::ObjectArray<mirror::Class>> GetThrowsValue(
-    const ClassData& klass,
-    const DexFile::AnnotationSetItem* annotation_set)
+ObjPtr<mirror::ObjectArray<mirror::Class>> GetThrowsValue(const ClassData& klass,
+                                                          const AnnotationSetItem* annotation_set)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(dex_file, annotation_set, "Ldalvik/annotation/Throws;",
                           DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
@@ -903,7 +905,7 @@
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> ProcessAnnotationSet(
     const ClassData& klass,
-    const DexFile::AnnotationSetItem* annotation_set,
+    const AnnotationSetItem* annotation_set,
     uint32_t visibility)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
@@ -925,7 +927,7 @@
 
   uint32_t dest_index = 0;
   for (uint32_t i = 0; i < size; ++i) {
-    const DexFile::AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
+    const AnnotationItem* annotation_item = dex_file.GetAnnotationItem(annotation_set, i);
     // Note that we do not use IsVisibilityCompatible here because older code
     // was correct for this case.
     if (annotation_item->visibility_ != visibility) {
@@ -961,7 +963,7 @@
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> ProcessAnnotationSetRefList(
     const ClassData& klass,
-    const DexFile::AnnotationSetRefList* set_ref_list,
+    const AnnotationSetRefList* set_ref_list,
     uint32_t size)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   const DexFile& dex_file = klass.GetDexFile();
@@ -982,8 +984,8 @@
     return nullptr;
   }
   for (uint32_t index = 0; index < size; ++index) {
-    const DexFile::AnnotationSetRefItem* set_ref_item = &set_ref_list->list_[index];
-    const DexFile::AnnotationSetItem* set_item = dex_file.GetSetRefItemItem(set_ref_item);
+    const AnnotationSetRefItem* set_ref_item = &set_ref_list->list_[index];
+    const AnnotationSetItem* set_item = dex_file.GetSetRefItemItem(set_ref_item);
     ObjPtr<mirror::Object> annotation_set = ProcessAnnotationSet(klass,
                                                                  set_item,
                                                                  DexFile::kDexVisibilityRuntime);
@@ -1000,7 +1002,7 @@
 
 ObjPtr<mirror::Object> GetAnnotationForField(ArtField* field,
                                              Handle<mirror::Class> annotation_class) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1013,14 +1015,14 @@
 }
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> GetAnnotationsForField(ArtField* field) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
   StackHandleScope<1> hs(Thread::Current());
   const ClassData field_class(hs, field);
   return ProcessAnnotationSet(field_class, annotation_set, DexFile::kDexVisibilityRuntime);
 }
 
 ObjPtr<mirror::ObjectArray<mirror::String>> GetSignatureAnnotationForField(ArtField* field) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1030,13 +1032,13 @@
 }
 
 bool IsFieldAnnotationPresent(ArtField* field, Handle<mirror::Class> annotation_class) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForField(field);
   if (annotation_set == nullptr) {
     return false;
   }
   StackHandleScope<1> hs(Thread::Current());
   const ClassData field_class(hs, field);
-  const DexFile::AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
+  const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
       field_class, annotation_set, DexFile::kDexVisibilityRuntime, annotation_class);
   return annotation_item != nullptr;
 }
@@ -1044,17 +1046,17 @@
 ObjPtr<mirror::Object> GetAnnotationDefaultValue(ArtMethod* method) {
   const ClassData klass(method);
   const DexFile* dex_file = &klass.GetDexFile();
-  const DexFile::AnnotationsDirectoryItem* annotations_dir =
+  const AnnotationsDirectoryItem* annotations_dir =
       dex_file->GetAnnotationsDirectory(*klass.GetClassDef());
   if (annotations_dir == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationSetItem* annotation_set =
+  const AnnotationSetItem* annotation_set =
       dex_file->GetClassAnnotationSet(annotations_dir);
   if (annotation_set == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationItem* annotation_item = SearchAnnotationSet(*dex_file, annotation_set,
+  const AnnotationItem* annotation_item = SearchAnnotationSet(*dex_file, annotation_set,
       "Ldalvik/annotation/AnnotationDefault;", DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
     return nullptr;
@@ -1087,7 +1089,7 @@
 
 ObjPtr<mirror::Object> GetAnnotationForMethod(ArtMethod* method,
                                               Handle<mirror::Class> annotation_class) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1096,14 +1098,14 @@
 }
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> GetAnnotationsForMethod(ArtMethod* method) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
   return ProcessAnnotationSet(ClassData(method),
                               annotation_set,
                               DexFile::kDexVisibilityRuntime);
 }
 
 ObjPtr<mirror::ObjectArray<mirror::Class>> GetExceptionTypesForMethod(ArtMethod* method) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1112,12 +1114,12 @@
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> GetParameterAnnotations(ArtMethod* method) {
   const DexFile* dex_file = method->GetDexFile();
-  const DexFile::ParameterAnnotationsItem* parameter_annotations =
+  const ParameterAnnotationsItem* parameter_annotations =
       FindAnnotationsItemForMethod(method);
   if (parameter_annotations == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationSetRefList* set_ref_list =
+  const AnnotationSetRefList* set_ref_list =
       dex_file->GetParameterAnnotationSetRefList(parameter_annotations);
   if (set_ref_list == nullptr) {
     return nullptr;
@@ -1128,12 +1130,12 @@
 
 uint32_t GetNumberOfAnnotatedMethodParameters(ArtMethod* method) {
   const DexFile* dex_file = method->GetDexFile();
-  const DexFile::ParameterAnnotationsItem* parameter_annotations =
+  const ParameterAnnotationsItem* parameter_annotations =
       FindAnnotationsItemForMethod(method);
   if (parameter_annotations == nullptr) {
     return 0u;
   }
-  const DexFile::AnnotationSetRefList* set_ref_list =
+  const AnnotationSetRefList* set_ref_list =
       dex_file->GetParameterAnnotationSetRefList(parameter_annotations);
   if (set_ref_list == nullptr) {
     return 0u;
@@ -1145,12 +1147,11 @@
                                                        uint32_t parameter_idx,
                                                        Handle<mirror::Class> annotation_class) {
   const DexFile* dex_file = method->GetDexFile();
-  const DexFile::ParameterAnnotationsItem* parameter_annotations =
-      FindAnnotationsItemForMethod(method);
+  const ParameterAnnotationsItem* parameter_annotations = FindAnnotationsItemForMethod(method);
   if (parameter_annotations == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationSetRefList* set_ref_list =
+  const AnnotationSetRefList* set_ref_list =
       dex_file->GetParameterAnnotationSetRefList(parameter_annotations);
   if (set_ref_list == nullptr) {
     return nullptr;
@@ -1158,8 +1159,8 @@
   if (parameter_idx >= set_ref_list->size_) {
     return nullptr;
   }
-  const DexFile::AnnotationSetRefItem* annotation_set_ref = &set_ref_list->list_[parameter_idx];
-  const DexFile::AnnotationSetItem* annotation_set =
+  const AnnotationSetRefItem* annotation_set_ref = &set_ref_list->list_[parameter_idx];
+  const AnnotationSetItem* annotation_set =
      dex_file->GetSetRefItemItem(annotation_set_ref);
   if (annotation_set == nullptr) {
     return nullptr;
@@ -1174,14 +1175,14 @@
     ArtMethod* method,
     /*out*/ MutableHandle<mirror::ObjectArray<mirror::String>>* names,
     /*out*/ MutableHandle<mirror::IntArray>* access_flags) {
-  const DexFile::AnnotationSetItem* annotation_set =
+  const AnnotationSetItem* annotation_set =
       FindAnnotationSetForMethod(method);
   if (annotation_set == nullptr) {
     return false;
   }
 
   const DexFile* dex_file = method->GetDexFile();
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(*dex_file,
                           annotation_set,
                           "Ldalvik/annotation/MethodParameters;",
@@ -1228,7 +1229,7 @@
 }
 
 ObjPtr<mirror::ObjectArray<mirror::String>> GetSignatureAnnotationForMethod(ArtMethod* method) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1238,11 +1239,11 @@
 bool IsMethodAnnotationPresent(ArtMethod* method,
                                Handle<mirror::Class> annotation_class,
                                uint32_t visibility /* = DexFile::kDexVisibilityRuntime */) {
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForMethod(method);
   if (annotation_set == nullptr) {
     return false;
   }
-  const DexFile::AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
+  const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
       ClassData(method), annotation_set, visibility, annotation_class);
   return annotation_item != nullptr;
 }
@@ -1263,11 +1264,11 @@
 // Check whether a method from the `dex_file` with the given `annotation_set`
 // is annotated with `annotation_descriptor` with build visibility.
 static bool IsMethodBuildAnnotationPresent(const DexFile& dex_file,
-                                           const DexFile::AnnotationSetItem& annotation_set,
+                                           const AnnotationSetItem& annotation_set,
                                            const char* annotation_descriptor,
                                            jclass annotation_class) {
   for (uint32_t i = 0; i < annotation_set.size_; ++i) {
-    const DexFile::AnnotationItem* annotation_item = dex_file.GetAnnotationItem(&annotation_set, i);
+    const AnnotationItem* annotation_item = dex_file.GetAnnotationItem(&annotation_set, i);
     if (!IsVisibilityCompatible(annotation_item->visibility_, DexFile::kDexVisibilityBuild)) {
       continue;
     }
@@ -1283,9 +1284,9 @@
 }
 
 uint32_t GetNativeMethodAnnotationAccessFlags(const DexFile& dex_file,
-                                              const DexFile::ClassDef& class_def,
+                                              const dex::ClassDef& class_def,
                                               uint32_t method_index) {
-  const DexFile::AnnotationSetItem* annotation_set =
+  const dex::AnnotationSetItem* annotation_set =
       FindAnnotationSetForMethod(dex_file, class_def, method_index);
   if (annotation_set == nullptr) {
     return 0u;
@@ -1312,7 +1313,7 @@
 ObjPtr<mirror::Object> GetAnnotationForClass(Handle<mirror::Class> klass,
                                              Handle<mirror::Class> annotation_class) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1324,17 +1325,17 @@
 
 ObjPtr<mirror::ObjectArray<mirror::Object>> GetAnnotationsForClass(Handle<mirror::Class> klass) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   return ProcessAnnotationSet(data, annotation_set, DexFile::kDexVisibilityRuntime);
 }
 
 ObjPtr<mirror::ObjectArray<mirror::Class>> GetDeclaredClasses(Handle<mirror::Class> klass) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(data.GetDexFile(), annotation_set, "Ldalvik/annotation/MemberClasses;",
                           DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
@@ -1355,11 +1356,11 @@
 
 ObjPtr<mirror::Class> GetDeclaringClass(Handle<mirror::Class> klass) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(data.GetDexFile(), annotation_set, "Ldalvik/annotation/EnclosingClass;",
                           DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
@@ -1382,11 +1383,11 @@
     return declaring_class;
   }
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(data.GetDexFile(),
                           annotation_set,
                           "Ldalvik/annotation/EnclosingMethod;",
@@ -1423,11 +1424,11 @@
 
 ObjPtr<mirror::Object> GetEnclosingMethod(Handle<mirror::Class> klass) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(data.GetDexFile(),
                           annotation_set,
                           "Ldalvik/annotation/EnclosingMethod;",
@@ -1441,11 +1442,11 @@
 
 bool GetInnerClass(Handle<mirror::Class> klass, /*out*/ ObjPtr<mirror::String>* name) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return false;
   }
-  const DexFile::AnnotationItem* annotation_item = SearchAnnotationSet(
+  const AnnotationItem* annotation_item = SearchAnnotationSet(
       data.GetDexFile(),
       annotation_set,
       "Ldalvik/annotation/InnerClass;",
@@ -1476,11 +1477,11 @@
 
 bool GetInnerClassFlags(Handle<mirror::Class> klass, uint32_t* flags) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return false;
   }
-  const DexFile::AnnotationItem* annotation_item =
+  const AnnotationItem* annotation_item =
       SearchAnnotationSet(data.GetDexFile(), annotation_set, "Ldalvik/annotation/InnerClass;",
                           DexFile::kDexVisibilitySystem);
   if (annotation_item == nullptr) {
@@ -1509,7 +1510,7 @@
 ObjPtr<mirror::ObjectArray<mirror::String>> GetSignatureAnnotationForClass(
     Handle<mirror::Class> klass) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
@@ -1526,12 +1527,12 @@
   }
 
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return nullptr;
   }
 
-  const DexFile::AnnotationItem* annotation_item = SearchAnnotationSet(
+  const AnnotationItem* annotation_item = SearchAnnotationSet(
       data.GetDexFile(),
       annotation_set,
       "Ldalvik/annotation/SourceDebugExtension;",
@@ -1562,11 +1563,11 @@
 
 bool IsClassAnnotationPresent(Handle<mirror::Class> klass, Handle<mirror::Class> annotation_class) {
   ClassData data(klass);
-  const DexFile::AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
+  const AnnotationSetItem* annotation_set = FindAnnotationSetForClass(data);
   if (annotation_set == nullptr) {
     return false;
   }
-  const DexFile::AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
+  const AnnotationItem* annotation_item = GetAnnotationItemFromAnnotationSet(
       data, annotation_set, DexFile::kDexVisibilityRuntime, annotation_class);
   return annotation_item != nullptr;
 }
diff --git a/runtime/dex/dex_file_annotations.h b/runtime/dex/dex_file_annotations.h
index bde7891..3625cee 100644
--- a/runtime/dex/dex_file_annotations.h
+++ b/runtime/dex/dex_file_annotations.h
@@ -18,7 +18,6 @@
 #define ART_RUNTIME_DEX_DEX_FILE_ANNOTATIONS_H_
 
 #include "dex/dex_file.h"
-
 #include "handle.h"
 #include "mirror/dex_cache.h"
 #include "mirror/object_array.h"
@@ -84,7 +83,7 @@
 // @dalvik.annotation.optimization.CriticalNative with build visibility.
 // If yes, return the associated access flags, i.e. kAccFastNative or kAccCriticalNative.
 uint32_t GetNativeMethodAnnotationAccessFlags(const DexFile& dex_file,
-                                              const DexFile::ClassDef& class_def,
+                                              const dex::ClassDef& class_def,
                                               uint32_t method_index);
 
 // Class annotations.
@@ -124,7 +123,7 @@
   RuntimeEncodedStaticFieldValueIterator(Handle<mirror::DexCache> dex_cache,
                                          Handle<mirror::ClassLoader> class_loader,
                                          ClassLinker* linker,
-                                         const DexFile::ClassDef& class_def)
+                                         const dex::ClassDef& class_def)
       REQUIRES_SHARED(Locks::mutator_lock_)
       : EncodedStaticFieldValueIterator(*dex_cache->GetDexFile(), class_def),
         dex_cache_(dex_cache),
diff --git a/runtime/dex_to_dex_decompiler.cc b/runtime/dex_to_dex_decompiler.cc
index aff9b47..d078d6f 100644
--- a/runtime/dex_to_dex_decompiler.cc
+++ b/runtime/dex_to_dex_decompiler.cc
@@ -32,7 +32,7 @@
 class DexDecompiler {
  public:
   DexDecompiler(const DexFile& dex_file,
-                const DexFile::CodeItem& code_item,
+                const dex::CodeItem& code_item,
                 const ArrayRef<const uint8_t>& quickened_info,
                 bool decompile_return_instruction)
     : code_item_accessor_(dex_file, &code_item),
@@ -194,7 +194,7 @@
 }
 
 bool ArtDecompileDEX(const DexFile& dex_file,
-                     const DexFile::CodeItem& code_item,
+                     const dex::CodeItem& code_item,
                      const ArrayRef<const uint8_t>& quickened_info,
                      bool decompile_return_instruction) {
   if (quickened_info.size() == 0 && !decompile_return_instruction) {
diff --git a/runtime/dex_to_dex_decompiler.h b/runtime/dex_to_dex_decompiler.h
index 93711d1..4b6b0f7 100644
--- a/runtime/dex_to_dex_decompiler.h
+++ b/runtime/dex_to_dex_decompiler.h
@@ -18,9 +18,15 @@
 #define ART_RUNTIME_DEX_TO_DEX_DECOMPILER_H_
 
 #include "base/array_ref.h"
-#include "dex/dex_file.h"
 
 namespace art {
+
+class DexFile;
+
+namespace dex {
+struct CodeItem;
+}  // namespace dex
+
 namespace optimizer {
 
 // "Decompile", that is unquicken, the code item provided, given the
@@ -30,7 +36,7 @@
 // consistent with DexToDexCompiler, but we should really change it to
 // DexFile::CodeItem*.
 bool ArtDecompileDEX(const DexFile& dex_file,
-                     const DexFile::CodeItem& code_item,
+                     const dex::CodeItem& code_item,
                      const ArrayRef<const uint8_t>& quickened_data,
                      bool decompile_return_instruction);
 
diff --git a/runtime/hidden_api.cc b/runtime/hidden_api.cc
index e0939dd..c146daa 100644
--- a/runtime/hidden_api.cc
+++ b/runtime/hidden_api.cc
@@ -98,7 +98,7 @@
 
 MemberSignature::MemberSignature(const ClassAccessor::Field& field) {
   const DexFile& dex_file = field.GetDexFile();
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(field.GetIndex());
+  const dex::FieldId& field_id = dex_file.GetFieldId(field.GetIndex());
   class_name_ = dex_file.GetFieldDeclaringClassDescriptor(field_id);
   member_name_ = dex_file.GetFieldName(field_id);
   type_signature_ = dex_file.GetFieldTypeDescriptor(field_id);
@@ -107,7 +107,7 @@
 
 MemberSignature::MemberSignature(const ClassAccessor::Method& method) {
   const DexFile& dex_file = method.GetDexFile();
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(method.GetIndex());
+  const dex::MethodId& method_id = dex_file.GetMethodId(method.GetIndex());
   class_name_ = dex_file.GetMethodDeclaringClassDescriptor(method_id);
   member_name_ = dex_file.GetMethodName(method_id);
   type_signature_ = dex_file.GetMethodSignature(method_id).ToString();
@@ -282,14 +282,14 @@
 }
 
 static void VisitMembers(const DexFile& dex_file,
-                         const DexFile::ClassDef& class_def,
+                         const dex::ClassDef& class_def,
                          const std::function<void(const ClassAccessor::Field&)>& fn_visit) {
   ClassAccessor accessor(dex_file, class_def, /* parse_hiddenapi_class_data= */ true);
   accessor.VisitFields(fn_visit, fn_visit);
 }
 
 static void VisitMembers(const DexFile& dex_file,
-                         const DexFile::ClassDef& class_def,
+                         const dex::ClassDef& class_def,
                          const std::function<void(const ClassAccessor::Method&)>& fn_visit) {
   ClassAccessor accessor(dex_file, class_def, /* parse_hiddenapi_class_data= */ true);
   accessor.VisitMethods(fn_visit, fn_visit);
@@ -317,7 +317,7 @@
   if (LIKELY(original_dex == nullptr)) {
     // Class is not redefined. Find the class def, iterate over its members and
     // find the entry corresponding to this `member`.
-    const DexFile::ClassDef* class_def = declaring_class->GetClassDef();
+    const dex::ClassDef* class_def = declaring_class->GetClassDef();
     if (class_def == nullptr) {
       flags = kNoDexFlags;
     } else {
@@ -338,7 +338,7 @@
     // to access a hidden member of a JVMTI-redefined class.
     uint16_t class_def_idx = ext->GetPreRedefineClassDefIndex();
     DCHECK_NE(class_def_idx, DexFile::kDexNoIndex16);
-    const DexFile::ClassDef& original_class_def = original_dex->GetClassDef(class_def_idx);
+    const dex::ClassDef& original_class_def = original_dex->GetClassDef(class_def_idx);
     MemberSignature member_signature(member);
     auto fn_visit = [&](const AccessorType& dex_member) {
       MemberSignature cur_signature(dex_member);
diff --git a/runtime/imtable-inl.h b/runtime/imtable-inl.h
index 93346f6..21e3eb1 100644
--- a/runtime/imtable-inl.h
+++ b/runtime/imtable-inl.h
@@ -46,7 +46,7 @@
     }
 
     const DexFile* dex_file = method->GetDexFile();
-    const DexFile::MethodId& method_id = dex_file->GetMethodId(method->GetDexMethodIndex());
+    const dex::MethodId& method_id = dex_file->GetMethodId(method->GetDexMethodIndex());
 
     // Class descriptor for the class component.
     *class_hash = ComputeModifiedUtf8Hash(dex_file->GetMethodDeclaringClassDescriptor(method_id));
@@ -54,7 +54,7 @@
     // Method name for the method component.
     *name_hash = ComputeModifiedUtf8Hash(dex_file->GetMethodName(method_id));
 
-    const DexFile::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
+    const dex::ProtoId& proto_id = dex_file->GetMethodPrototype(method_id);
 
     // Read the proto for the signature component.
     uint32_t tmp = ComputeModifiedUtf8Hash(
@@ -63,10 +63,10 @@
     // Mix in the argument types.
     // Note: we could consider just using the shorty. This would be faster, at the price of
     //       potential collisions.
-    const DexFile::TypeList* param_types = dex_file->GetProtoParameters(proto_id);
+    const dex::TypeList* param_types = dex_file->GetProtoParameters(proto_id);
     if (param_types != nullptr) {
       for (size_t i = 0; i != param_types->Size(); ++i) {
-        const DexFile::TypeItem& type = param_types->GetTypeItem(i);
+        const dex::TypeItem& type = param_types->GetTypeItem(i);
         tmp = 31 * tmp + ComputeModifiedUtf8Hash(
             dex_file->GetTypeDescriptor(dex_file->GetTypeId(type.type_idx_)));
       }
diff --git a/runtime/interpreter/interpreter_common.cc b/runtime/interpreter/interpreter_common.cc
index e52a1c9..7a40ab4 100644
--- a/runtime/interpreter/interpreter_common.cc
+++ b/runtime/interpreter/interpreter_common.cc
@@ -1168,7 +1168,7 @@
                                                                   const DexFile* dex_file,
                                                                   uint32_t call_site_idx)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::CallSiteIdItem& csi = dex_file->GetCallSiteId(call_site_idx);
+  const dex::CallSiteIdItem& csi = dex_file->GetCallSiteId(call_site_idx);
   CallSiteArrayValueIterator it(*dex_file, csi);
   DCHECK_GE(it.Size(), 1u);
 
@@ -1223,7 +1223,7 @@
   static constexpr size_t kMandatoryArgumentsCount = 3;
   ArtMethod* referrer = shadow_frame.GetMethod();
   const DexFile* dex_file = referrer->GetDexFile();
-  const DexFile::CallSiteIdItem& csi = dex_file->GetCallSiteId(call_site_idx);
+  const dex::CallSiteIdItem& csi = dex_file->GetCallSiteId(call_site_idx);
   CallSiteArrayValueIterator it(*dex_file, csi);
   if (it.Size() < kMandatoryArgumentsCount) {
     ThrowBootstrapMethodError("Truncated bootstrap arguments (%zu < %zu)",
@@ -1637,7 +1637,7 @@
 
     // We need to do runtime check on reference assignment. We need to load the shorty
     // to get the exact type of each reference argument.
-    const DexFile::TypeList* params = method->GetParameterTypeList();
+    const dex::TypeList* params = method->GetParameterTypeList();
     uint32_t shorty_len = 0;
     const char* shorty = method->GetShorty(&shorty_len);
 
diff --git a/runtime/interpreter/interpreter_common.h b/runtime/interpreter/interpreter_common.h
index d1896e6..6366035 100644
--- a/runtime/interpreter/interpreter_common.h
+++ b/runtime/interpreter/interpreter_common.h
@@ -621,7 +621,7 @@
 
 static inline bool IsStringInit(const DexFile* dex_file, uint32_t method_idx)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::MethodId& method_id = dex_file->GetMethodId(method_idx);
+  const dex::MethodId& method_id = dex_file->GetMethodId(method_idx);
   const char* class_name = dex_file->StringByTypeIdx(method_id.class_idx_);
   const char* method_name = dex_file->GetMethodName(method_id);
   // Instead of calling ResolveMethod() which has suspend point and can trigger
diff --git a/runtime/mirror/class-inl.h b/runtime/mirror/class-inl.h
index 679ca43..bdad412 100644
--- a/runtime/mirror/class-inl.h
+++ b/runtime/mirror/class-inl.h
@@ -825,7 +825,7 @@
     return ProxyDescriptorEquals(match);
   } else {
     const DexFile& dex_file = GetDexFile();
-    const DexFile::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_);
+    const dex::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_);
     return strcmp(dex_file.GetTypeDescriptor(type_id), match) == 0;
   }
 }
@@ -899,7 +899,7 @@
     ObjectArray<Class>* interfaces = GetProxyInterfaces();
     return interfaces != nullptr ? interfaces->GetLength() : 0;
   } else {
-    const DexFile::TypeList* interfaces = GetInterfaceTypeList();
+    const dex::TypeList* interfaces = GetInterfaceTypeList();
     if (interfaces == nullptr) {
       return 0;
     } else {
diff --git a/runtime/mirror/class.cc b/runtime/mirror/class.cc
index c5ed1bf..515394a 100644
--- a/runtime/mirror/class.cc
+++ b/runtime/mirror/class.cc
@@ -493,7 +493,7 @@
                                       PointerSize pointer_size) {
   // We always search by name and signature, ignoring the type index in the MethodId.
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
+  const dex::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
   StringPiece name = dex_file.StringDataByIdx(method_id.name_idx_);
   const Signature signature = dex_file.GetMethodSignature(method_id);
   return FindInterfaceMethod(name, signature, pointer_size);
@@ -620,7 +620,7 @@
   }
   // If not found, we need to search by name and signature.
   const DexFile& dex_file = *dex_cache->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
+  const dex::MethodId& method_id = dex_file.GetMethodId(dex_method_idx);
   const Signature signature = dex_file.GetMethodSignature(method_id);
   StringPiece name;  // Delay strlen() until actually needed.
   // If we do not have a dex_cache match, try to find the declared method in this class now.
@@ -651,7 +651,7 @@
       // Matching dex_cache. We cannot compare the `dex_method_idx` anymore because
       // the type index differs, so compare the name index and proto index.
       for (ArtMethod& method : declared_methods) {
-        const DexFile::MethodId& cmp_method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
+        const dex::MethodId& cmp_method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
         if (cmp_method_id.name_idx_ == method_id.name_idx_ &&
             cmp_method_id.proto_idx_ == method_id.proto_idx_) {
           candidate_method = &method;
@@ -1005,7 +1005,7 @@
     return storage->c_str();
   } else {
     const DexFile& dex_file = GetDexFile();
-    const DexFile::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_);
+    const dex::TypeId& type_id = dex_file.GetTypeId(GetClassDef()->class_idx_);
     return dex_file.GetTypeDescriptor(type_id);
   }
 }
@@ -1018,7 +1018,7 @@
   return storage->c_str();
 }
 
-const DexFile::ClassDef* Class::GetClassDef() {
+const dex::ClassDef* Class::GetClassDef() {
   uint16_t class_def_idx = GetDexClassDefIndex();
   if (class_def_idx == DexFile::kDexNoIndex16) {
     return nullptr;
@@ -1086,7 +1086,7 @@
 
 const char* Class::GetSourceFile() {
   const DexFile& dex_file = GetDexFile();
-  const DexFile::ClassDef* dex_class_def = GetClassDef();
+  const dex::ClassDef* dex_class_def = GetClassDef();
   if (dex_class_def == nullptr) {
     // Generated classes have no class def.
     return nullptr;
@@ -1103,8 +1103,8 @@
   return "generated class";
 }
 
-const DexFile::TypeList* Class::GetInterfaceTypeList() {
-  const DexFile::ClassDef* class_def = GetClassDef();
+const dex::TypeList* Class::GetInterfaceTypeList() {
+  const dex::ClassDef* class_def = GetClassDef();
   if (class_def == nullptr) {
     return nullptr;
   }
@@ -1247,7 +1247,7 @@
 
 dex::TypeIndex Class::FindTypeIndexInOtherDexFile(const DexFile& dex_file) {
   std::string temp;
-  const DexFile::TypeId* type_id = dex_file.FindTypeId(GetDescriptor(&temp));
+  const dex::TypeId* type_id = dex_file.FindTypeId(GetDescriptor(&temp));
   return (type_id == nullptr) ? dex::TypeIndex() : dex_file.GetIndexForTypeId(*type_id);
 }
 
diff --git a/runtime/mirror/class.h b/runtime/mirror/class.h
index d5aa514..8e392bc 100644
--- a/runtime/mirror/class.h
+++ b/runtime/mirror/class.h
@@ -24,7 +24,7 @@
 #include "base/stride_iterator.h"
 #include "class_flags.h"
 #include "class_status.h"
-#include "dex/dex_file.h"
+#include "dex/dex_file_structs.h"
 #include "dex/dex_file_types.h"
 #include "dex/modifiers.h"
 #include "dex/primitive.h"
@@ -40,6 +40,7 @@
 class ArtField;
 class ArtMethod;
 struct ClassOffsets;
+class DexFile;
 template<class T> class Handle;
 enum InvokeType : uint32_t;
 template<typename T> class LengthPrefixedArray;
@@ -1133,7 +1134,7 @@
 
   bool DescriptorEquals(const char* match) REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::ClassDef* GetClassDef() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::ClassDef* GetClassDef() REQUIRES_SHARED(Locks::mutator_lock_);
 
   ALWAYS_INLINE uint32_t NumDirectInterfaces() REQUIRES_SHARED(Locks::mutator_lock_);
 
@@ -1156,7 +1157,7 @@
 
   const DexFile& GetDexFile() REQUIRES_SHARED(Locks::mutator_lock_);
 
-  const DexFile::TypeList* GetInterfaceTypeList() REQUIRES_SHARED(Locks::mutator_lock_);
+  const dex::TypeList* GetInterfaceTypeList() REQUIRES_SHARED(Locks::mutator_lock_);
 
   // Asserts we are initialized or initializing in the given thread.
   void AssertInitializedOrInitializingInThread(Thread* self)
diff --git a/runtime/mirror/dex_cache_test.cc b/runtime/mirror/dex_cache_test.cc
index 36c5ae2..f7c1c02 100644
--- a/runtime/mirror/dex_cache_test.cc
+++ b/runtime/mirror/dex_cache_test.cc
@@ -146,8 +146,8 @@
   Handle<mirror::DexCache> dex_cache = hs.NewHandle(
       class_linker_->FindDexCache(Thread::Current(), dex_file));
 
-  const DexFile::MethodId& method1_id = dex_file.GetMethodId(method1->GetDexMethodIndex());
-  const DexFile::MethodId& method2_id = dex_file.GetMethodId(method2->GetDexMethodIndex());
+  const dex::MethodId& method1_id = dex_file.GetMethodId(method1->GetDexMethodIndex());
+  const dex::MethodId& method2_id = dex_file.GetMethodId(method2->GetDexMethodIndex());
   Handle<mirror::MethodType> method1_type = hs.NewHandle(
       class_linker_->ResolveMethodType(soa.Self(),
                                        method1_id.proto_idx_,
diff --git a/runtime/mirror/object_test.cc b/runtime/mirror/object_test.cc
index d8c7b1d..f4b8ba5 100644
--- a/runtime/mirror/object_test.cc
+++ b/runtime/mirror/object_test.cc
@@ -364,16 +364,16 @@
   Handle<Class> klass =
       hs.NewHandle(class_linker_->FindClass(soa.Self(), "LStaticsFromCode;", loader));
   ArtMethod* clinit = klass->FindClassInitializer(kRuntimePointerSize);
-  const DexFile::TypeId* klass_type_id = dex_file->FindTypeId("LStaticsFromCode;");
+  const dex::TypeId* klass_type_id = dex_file->FindTypeId("LStaticsFromCode;");
   ASSERT_TRUE(klass_type_id != nullptr);
 
-  const DexFile::TypeId* type_type_id = dex_file->FindTypeId("Ljava/lang/Object;");
+  const dex::TypeId* type_type_id = dex_file->FindTypeId("Ljava/lang/Object;");
   ASSERT_TRUE(type_type_id != nullptr);
 
-  const DexFile::StringId* name_str_id = dex_file->FindStringId("s0");
+  const dex::StringId* name_str_id = dex_file->FindStringId("s0");
   ASSERT_TRUE(name_str_id != nullptr);
 
-  const DexFile::FieldId* field_id = dex_file->FindFieldId(
+  const dex::FieldId* field_id = dex_file->FindFieldId(
       *klass_type_id, *name_str_id, *type_type_id);
   ASSERT_TRUE(field_id != nullptr);
   uint32_t field_idx = dex_file->GetIndexForFieldId(*field_id);
diff --git a/runtime/native/dalvik_system_DexFile.cc b/runtime/native/dalvik_system_DexFile.cc
index 1da91b0..52482b7 100644
--- a/runtime/native/dalvik_system_DexFile.cc
+++ b/runtime/native/dalvik_system_DexFile.cc
@@ -383,7 +383,7 @@
   const std::string descriptor(DotToDescriptor(class_name.c_str()));
   const size_t hash(ComputeModifiedUtf8Hash(descriptor.c_str()));
   for (auto& dex_file : dex_files) {
-    const DexFile::ClassDef* dex_class_def =
+    const dex::ClassDef* dex_class_def =
         OatDexFile::FindClassDef(*dex_file, descriptor.c_str(), hash);
     if (dex_class_def != nullptr) {
       ScopedObjectAccess soa(env);
@@ -440,7 +440,7 @@
   std::set<const char*, CharPointerComparator> descriptors;
   for (auto& dex_file : dex_files) {
     for (size_t i = 0; i < dex_file->NumClassDefs(); ++i) {
-      const DexFile::ClassDef& class_def = dex_file->GetClassDef(i);
+      const dex::ClassDef& class_def = dex_file->GetClassDef(i);
       const char* descriptor = dex_file->GetClassDescriptor(class_def);
       descriptors.insert(descriptor);
     }
diff --git a/runtime/native/dalvik_system_VMRuntime.cc b/runtime/native/dalvik_system_VMRuntime.cc
index 892d4cc..d705d5f 100644
--- a/runtime/native/dalvik_system_VMRuntime.cc
+++ b/runtime/native/dalvik_system_VMRuntime.cc
@@ -413,7 +413,7 @@
     return;  // The entry already contains some ArtField.
   }
   const DexFile* dex_file = dex_cache->GetDexFile();
-  const DexFile::FieldId& field_id = dex_file->GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file->GetFieldId(field_idx);
   ObjPtr<mirror::Class> klass = Runtime::Current()->GetClassLinker()->LookupResolvedType(
       field_id.class_idx_, dex_cache, /* class_loader= */ nullptr);
   if (klass == nullptr) {
@@ -439,7 +439,7 @@
     return;  // The entry already contains some ArtMethod.
   }
   const DexFile* dex_file = dex_cache->GetDexFile();
-  const DexFile::MethodId& method_id = dex_file->GetMethodId(method_idx);
+  const dex::MethodId& method_id = dex_file->GetMethodId(method_idx);
   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
 
   ObjPtr<mirror::Class> klass = class_linker->LookupResolvedType(
diff --git a/runtime/native/java_lang_Class.cc b/runtime/native/java_lang_Class.cc
index 612a4b3..d022c3b 100644
--- a/runtime/native/java_lang_Class.cc
+++ b/runtime/native/java_lang_Class.cc
@@ -220,7 +220,7 @@
     return soa.AddLocalReference<jobjectArray>(klass->GetProxyInterfaces()->Clone(soa.Self()));
   }
 
-  const DexFile::TypeList* iface_list = klass->GetInterfaceTypeList();
+  const dex::TypeList* iface_list = klass->GetInterfaceTypeList();
   if (iface_list == nullptr) {
     return nullptr;
   }
diff --git a/runtime/native/java_lang_reflect_Executable.cc b/runtime/native/java_lang_reflect_Executable.cc
index ada0a64..2ce56b5 100644
--- a/runtime/native/java_lang_reflect_Executable.cc
+++ b/runtime/native/java_lang_reflect_Executable.cc
@@ -275,8 +275,8 @@
   this_method = this_method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
   other_method = other_method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
 
-  const DexFile::TypeList* this_list = this_method->GetParameterTypeList();
-  const DexFile::TypeList* other_list = other_method->GetParameterTypeList();
+  const dex::TypeList* this_list = this_method->GetParameterTypeList();
+  const dex::TypeList* other_list = other_method->GetParameterTypeList();
 
   if (this_list == other_list) {
     return 0;
@@ -298,9 +298,9 @@
   }
 
   for (int32_t i = 0; i < this_size; ++i) {
-    const DexFile::TypeId& lhs = this_method->GetDexFile()->GetTypeId(
+    const dex::TypeId& lhs = this_method->GetDexFile()->GetTypeId(
         this_list->GetTypeItem(i).type_idx_);
-    const DexFile::TypeId& rhs = other_method->GetDexFile()->GetTypeId(
+    const dex::TypeId& rhs = other_method->GetDexFile()->GetTypeId(
         other_list->GetTypeItem(i).type_idx_);
 
     uint32_t lhs_len, rhs_len;
@@ -343,7 +343,7 @@
   ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
   method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
 
-  const DexFile::TypeList* params = method->GetParameterTypeList();
+  const dex::TypeList* params = method->GetParameterTypeList();
   if (params == nullptr) {
     return nullptr;
   }
@@ -378,7 +378,7 @@
   ArtMethod* method = ArtMethod::FromReflectedMethod(soa, javaMethod);
   method = method->GetInterfaceMethodIfProxy(kRuntimePointerSize);
 
-  const DexFile::TypeList* params = method->GetParameterTypeList();
+  const dex::TypeList* params = method->GetParameterTypeList();
   return (params == nullptr) ? 0 : params->Size();
 }
 
diff --git a/runtime/oat_file.cc b/runtime/oat_file.cc
index de4826f..f4a8c50 100644
--- a/runtime/oat_file.cc
+++ b/runtime/oat_file.cc
@@ -48,7 +48,9 @@
 #include "base/unix_file/fd_file.h"
 #include "base/utils.h"
 #include "dex/art_dex_file_loader.h"
+#include "dex/dex_file.h"
 #include "dex/dex_file_loader.h"
+#include "dex/dex_file_structs.h"
 #include "dex/dex_file_types.h"
 #include "dex/standard_dex_file.h"
 #include "dex/type_lookup_table.h"
@@ -1831,13 +1833,13 @@
                            reinterpret_cast<const OatMethodOffsets*>(methods_pointer));
 }
 
-const DexFile::ClassDef* OatDexFile::FindClassDef(const DexFile& dex_file,
-                                                  const char* descriptor,
-                                                  size_t hash) {
+const dex::ClassDef* OatDexFile::FindClassDef(const DexFile& dex_file,
+                                              const char* descriptor,
+                                              size_t hash) {
   const OatDexFile* oat_dex_file = dex_file.GetOatDexFile();
   DCHECK_EQ(ComputeModifiedUtf8Hash(descriptor), hash);
   bool used_lookup_table = false;
-  const DexFile::ClassDef* lookup_table_classdef = nullptr;
+  const dex::ClassDef* lookup_table_classdef = nullptr;
   if (LIKELY((oat_dex_file != nullptr) && oat_dex_file->GetTypeLookupTable().Valid())) {
     used_lookup_table = true;
     const uint32_t class_def_idx = oat_dex_file->GetTypeLookupTable().Lookup(descriptor, hash);
@@ -1854,10 +1856,10 @@
     DCHECK(!used_lookup_table);
     return nullptr;
   }
-  const DexFile::TypeId* type_id = dex_file.FindTypeId(descriptor);
+  const dex::TypeId* type_id = dex_file.FindTypeId(descriptor);
   if (type_id != nullptr) {
     dex::TypeIndex type_idx = dex_file.GetIndexForTypeId(*type_id);
-    const DexFile::ClassDef* found_class_def = dex_file.FindClassDef(type_idx);
+    const dex::ClassDef* found_class_def = dex_file.FindClassDef(type_idx);
     if (kIsDebugBuild && used_lookup_table) {
       DCHECK_EQ(found_class_def, lookup_table_classdef);
     }
diff --git a/runtime/oat_file.h b/runtime/oat_file.h
index ab6e62d..3e9c01f 100644
--- a/runtime/oat_file.h
+++ b/runtime/oat_file.h
@@ -29,7 +29,6 @@
 #include "base/tracking_safe_map.h"
 #include "class_status.h"
 #include "compiler_filter.h"
-#include "dex/dex_file.h"
 #include "dex/dex_file_layout.h"
 #include "dex/type_lookup_table.h"
 #include "dex/utf.h"
@@ -40,6 +39,7 @@
 namespace art {
 
 class BitVector;
+class DexFile;
 class ElfFile;
 class DexLayoutSections;
 template <class MirrorType> class GcRoot;
@@ -50,6 +50,10 @@
 class OatQuickMethodHeader;
 class VdexFile;
 
+namespace dex {
+struct ClassDef;
+}  // namespace dex
+
 namespace gc {
 namespace collector {
 class DummyOatFile;
@@ -500,9 +504,9 @@
 
   // Looks up a class definition by its class descriptor. Hash must be
   // ComputeModifiedUtf8Hash(descriptor).
-  static const DexFile::ClassDef* FindClassDef(const DexFile& dex_file,
-                                               const char* descriptor,
-                                               size_t hash);
+  static const dex::ClassDef* FindClassDef(const DexFile& dex_file,
+                                           const char* descriptor,
+                                           size_t hash);
 
   // Madvise the dex file based on the state we are moving to.
   static void MadviseDexFile(const DexFile& dex_file, MadviseState state);
diff --git a/runtime/oat_file_manager.cc b/runtime/oat_file_manager.cc
index 9552ca3..5aa1ea2 100644
--- a/runtime/oat_file_manager.cc
+++ b/runtime/oat_file_manager.cc
@@ -186,7 +186,7 @@
   static BitVector GenerateTypeIndexes(const DexFile* dex_file) {
     BitVector type_indexes(/*start_bits=*/0, /*expandable=*/true, Allocator::GetMallocAllocator());
     for (uint16_t i = 0; i < dex_file->NumClassDefs(); ++i) {
-      const DexFile::ClassDef& class_def = dex_file->GetClassDef(i);
+      const dex::ClassDef& class_def = dex_file->GetClassDef(i);
       uint16_t type_idx = class_def.class_idx_.index_;
       type_indexes.SetBit(type_idx);
     }
diff --git a/runtime/reflection.cc b/runtime/reflection.cc
index 8011836..dfd7e64 100644
--- a/runtime/reflection.cc
+++ b/runtime/reflection.cc
@@ -226,7 +226,7 @@
                                     ArtMethod* m,
                                     Thread* self)
       REQUIRES_SHARED(Locks::mutator_lock_) {
-    const DexFile::TypeList* classes = m->GetParameterTypeList();
+    const dex::TypeList* classes = m->GetParameterTypeList();
     // Set receiver if non-null (method is not static)
     if (receiver != nullptr) {
       Append(receiver);
@@ -367,7 +367,7 @@
 
 void CheckMethodArguments(JavaVMExt* vm, ArtMethod* m, uint32_t* args)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::TypeList* params = m->GetParameterTypeList();
+  const dex::TypeList* params = m->GetParameterTypeList();
   if (params == nullptr) {
     return;  // No arguments so nothing to check.
   }
@@ -461,7 +461,7 @@
 bool CheckArgsForInvokeMethod(ArtMethod* np_method,
                               ObjPtr<mirror::ObjectArray<mirror::Object>> objects)
     REQUIRES_SHARED(Locks::mutator_lock_) {
-  const DexFile::TypeList* classes = np_method->GetParameterTypeList();
+  const dex::TypeList* classes = np_method->GetParameterTypeList();
   uint32_t classes_size = (classes == nullptr) ? 0 : classes->Size();
   uint32_t arg_count = (objects == nullptr) ? 0 : objects->GetLength();
   if (UNLIKELY(arg_count != classes_size)) {
diff --git a/runtime/runtime_callbacks.cc b/runtime/runtime_callbacks.cc
index bf74816..da13eb8 100644
--- a/runtime/runtime_callbacks.cc
+++ b/runtime/runtime_callbacks.cc
@@ -205,14 +205,14 @@
                                       Handle<mirror::Class> temp_class,
                                       Handle<mirror::ClassLoader> loader,
                                       const DexFile& initial_dex_file,
-                                      const DexFile::ClassDef& initial_class_def,
+                                      const dex::ClassDef& initial_class_def,
                                       /*out*/DexFile const** final_dex_file,
-                                      /*out*/DexFile::ClassDef const** final_class_def) {
+                                      /*out*/dex::ClassDef const** final_class_def) {
   DexFile const* current_dex_file = &initial_dex_file;
-  DexFile::ClassDef const* current_class_def = &initial_class_def;
+  dex::ClassDef const* current_class_def = &initial_class_def;
   for (ClassLoadCallback* cb : class_callbacks_) {
     DexFile const* new_dex_file = nullptr;
-    DexFile::ClassDef const* new_class_def = nullptr;
+    dex::ClassDef const* new_class_def = nullptr;
     cb->ClassPreDefine(descriptor,
                        temp_class,
                        loader,
diff --git a/runtime/runtime_callbacks.h b/runtime/runtime_callbacks.h
index 32ee3aa..41d552a 100644
--- a/runtime/runtime_callbacks.h
+++ b/runtime/runtime_callbacks.h
@@ -22,11 +22,14 @@
 #include "base/array_ref.h"
 #include "base/locks.h"
 #include "base/macros.h"
-#include "dex/dex_file.h"
 #include "handle.h"
 
 namespace art {
 
+namespace dex {
+struct ClassDef;
+}  // namespace dex
+
 namespace mirror {
 class Class;
 class ClassLoader;
@@ -35,6 +38,7 @@
 
 class ArtMethod;
 class ClassLoadCallback;
+class DexFile;
 class Thread;
 class MethodCallback;
 class Monitor;
@@ -183,9 +187,9 @@
                       Handle<mirror::Class> temp_class,
                       Handle<mirror::ClassLoader> loader,
                       const DexFile& initial_dex_file,
-                      const DexFile::ClassDef& initial_class_def,
+                      const dex::ClassDef& initial_class_def,
                       /*out*/DexFile const** final_dex_file,
-                      /*out*/DexFile::ClassDef const** final_class_def)
+                      /*out*/dex::ClassDef const** final_class_def)
       REQUIRES_SHARED(Locks::mutator_lock_);
 
   void AddMethodCallback(MethodCallback* cb) REQUIRES(Locks::mutator_lock_);
diff --git a/runtime/runtime_callbacks_test.cc b/runtime/runtime_callbacks_test.cc
index d08be72..df06a9f 100644
--- a/runtime/runtime_callbacks_test.cc
+++ b/runtime/runtime_callbacks_test.cc
@@ -257,9 +257,9 @@
                         Handle<mirror::Class> klass ATTRIBUTE_UNUSED,
                         Handle<mirror::ClassLoader> class_loader ATTRIBUTE_UNUSED,
                         const DexFile& initial_dex_file,
-                        const DexFile::ClassDef& initial_class_def ATTRIBUTE_UNUSED,
+                        const dex::ClassDef& initial_class_def ATTRIBUTE_UNUSED,
                         /*out*/DexFile const** final_dex_file ATTRIBUTE_UNUSED,
-                        /*out*/DexFile::ClassDef const** final_class_def ATTRIBUTE_UNUSED) override
+                        /*out*/dex::ClassDef const** final_class_def ATTRIBUTE_UNUSED) override
         REQUIRES_SHARED(Locks::mutator_lock_) {
       const std::string& location = initial_dex_file.GetLocation();
       std::string event =
diff --git a/runtime/transaction_test.cc b/runtime/transaction_test.cc
index 3d9afa0..69ded3d 100644
--- a/runtime/transaction_test.cc
+++ b/runtime/transaction_test.cc
@@ -489,7 +489,7 @@
 
   // Go search the dex file to find the string id of our string.
   static const char* kResolvedString = "ResolvedString";
-  const DexFile::StringId* string_id = dex_file->FindStringId(kResolvedString);
+  const dex::StringId* string_id = dex_file->FindStringId(kResolvedString);
   ASSERT_TRUE(string_id != nullptr);
   dex::StringIndex string_idx = dex_file->GetIndexForStringId(*string_id);
   ASSERT_TRUE(string_idx.IsValid());
diff --git a/runtime/vdex_file.cc b/runtime/vdex_file.cc
index f24711a..72c42b9 100644
--- a/runtime/vdex_file.cc
+++ b/runtime/vdex_file.cc
@@ -281,12 +281,12 @@
     return;
   }
   // Make sure to not unquicken the same code item multiple times.
-  std::unordered_set<const DexFile::CodeItem*> unquickened_code_item;
+  std::unordered_set<const dex::CodeItem*> unquickened_code_item;
   CompactOffsetTable::Accessor accessor(GetQuickenInfoOffsetTable(source_dex_begin,
                                                                   quickening_info));
   for (ClassAccessor class_accessor : target_dex_file.GetClasses()) {
     for (const ClassAccessor::Method& method : class_accessor.GetMethods()) {
-      const DexFile::CodeItem* code_item = method.GetCodeItem();
+      const dex::CodeItem* code_item = method.GetCodeItem();
       if (code_item != nullptr && unquickened_code_item.emplace(code_item).second) {
         const uint32_t offset = accessor.GetOffset(method.GetIndex());
         // Offset being 0 means not quickened.
diff --git a/runtime/verifier/method_verifier.cc b/runtime/verifier/method_verifier.cc
index 0b33a0b..1679821 100644
--- a/runtime/verifier/method_verifier.cc
+++ b/runtime/verifier/method_verifier.cc
@@ -158,7 +158,7 @@
   bool early_failure = false;
   std::string failure_message;
   const DexFile& dex_file = klass->GetDexFile();
-  const DexFile::ClassDef* class_def = klass->GetClassDef();
+  const dex::ClassDef* class_def = klass->GetClassDef();
   ObjPtr<mirror::Class> super = klass->GetSuperClass();
   std::string temp;
   if (super == nullptr && strcmp("Ljava/lang/Object;", klass->GetDescriptor(&temp)) != 0) {
@@ -210,7 +210,7 @@
                                         const DexFile* dex_file,
                                         Handle<mirror::DexCache> dex_cache,
                                         Handle<mirror::ClassLoader> class_loader,
-                                        const DexFile::ClassDef& class_def,
+                                        const dex::ClassDef& class_def,
                                         CompilerCallbacks* callbacks,
                                         bool allow_soft_failures,
                                         HardFailLogMode log_level,
@@ -319,8 +319,8 @@
                                                          const DexFile* dex_file,
                                                          Handle<mirror::DexCache> dex_cache,
                                                          Handle<mirror::ClassLoader> class_loader,
-                                                         const DexFile::ClassDef& class_def,
-                                                         const DexFile::CodeItem* code_item,
+                                                         const dex::ClassDef& class_def,
+                                                         const dex::CodeItem* code_item,
                                                          ArtMethod* method,
                                                          uint32_t method_access_flags,
                                                          CompilerCallbacks* callbacks,
@@ -462,8 +462,8 @@
                                                     const DexFile* dex_file,
                                                     Handle<mirror::DexCache> dex_cache,
                                                     Handle<mirror::ClassLoader> class_loader,
-                                                    const DexFile::ClassDef& class_def,
-                                                    const DexFile::CodeItem* code_item,
+                                                    const dex::ClassDef& class_def,
+                                                    const dex::CodeItem* code_item,
                                                     ArtMethod* method,
                                                     uint32_t method_access_flags,
                                                     uint32_t api_level) {
@@ -500,8 +500,8 @@
                                const DexFile* dex_file,
                                Handle<mirror::DexCache> dex_cache,
                                Handle<mirror::ClassLoader> class_loader,
-                               const DexFile::ClassDef& class_def,
-                               const DexFile::CodeItem* code_item,
+                               const dex::ClassDef& class_def,
+                               const dex::CodeItem* code_item,
                                uint32_t dex_method_idx,
                                ArtMethod* method,
                                uint32_t method_access_flags,
@@ -602,7 +602,7 @@
 bool MethodVerifier::Verify() {
   // Some older code doesn't correctly mark constructors as such. Test for this case by looking at
   // the name.
-  const DexFile::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
+  const dex::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
   const char* method_name = dex_file_->StringDataByIdx(method_id.name_idx_);
   bool instance_constructor_by_name = strcmp("<init>", method_name) == 0;
   bool static_constructor_by_name = strcmp("<clinit>", method_name) == 0;
@@ -917,7 +917,7 @@
     return true;
   }
   const uint32_t insns_size = code_item_accessor_.InsnsSizeInCodeUnits();
-  for (const DexFile::TryItem& try_item : code_item_accessor_.TryItems()) {
+  for (const dex::TryItem& try_item : code_item_accessor_.TryItems()) {
     const uint32_t start = try_item.start_addr_;
     const uint32_t end = start + try_item.insn_count_;
     if ((start >= end) || (start >= insns_size) || (end > insns_size)) {
@@ -1637,7 +1637,7 @@
     cur_arg++;
   }
 
-  const DexFile::ProtoId& proto_id =
+  const dex::ProtoId& proto_id =
       dex_file_->GetMethodPrototype(dex_file_->GetMethodId(dex_method_idx_));
   DexFileParameterIterator iterator(*dex_file_, proto_id);
 
@@ -1876,7 +1876,7 @@
 // Returns the index of the first final instance field of the given class, or kDexNoIndex if there
 // is no such field.
 static uint32_t GetFirstFinalInstanceFieldIndex(const DexFile& dex_file, dex::TypeIndex type_idx) {
-  const DexFile::ClassDef* class_def = dex_file.FindClassDef(type_idx);
+  const dex::ClassDef* class_def = dex_file.FindClassDef(type_idx);
   DCHECK(class_def != nullptr);
   ClassAccessor accessor(dex_file, *class_def);
   for (const ClassAccessor::Field& field : accessor.GetInstanceFields()) {
@@ -2885,7 +2885,7 @@
       }
       if (return_type == nullptr) {
         uint32_t method_idx = GetMethodIdxOfInvoke(inst);
-        const DexFile::MethodId& method_id = dex_file_->GetMethodId(method_idx);
+        const dex::MethodId& method_id = dex_file_->GetMethodId(method_idx);
         dex::TypeIndex return_type_idx =
             dex_file_->GetProtoId(method_id.proto_idx_).return_type_idx_;
         const char* descriptor = dex_file_->StringByTypeIdx(return_type_idx);
@@ -2908,7 +2908,7 @@
       const RegType* return_type = nullptr;
       if (called_method == nullptr) {
         uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
-        const DexFile::MethodId& method_id = dex_file_->GetMethodId(method_idx);
+        const dex::MethodId& method_id = dex_file_->GetMethodId(method_idx);
         is_constructor = strcmp("<init>", dex_file_->StringDataByIdx(method_id.name_idx_)) == 0;
         dex::TypeIndex return_type_idx =
             dex_file_->GetProtoId(method_id.proto_idx_).return_type_idx_;
@@ -2986,7 +2986,7 @@
         const char* descriptor;
         if (called_method == nullptr) {
           uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
-          const DexFile::MethodId& method_id = dex_file_->GetMethodId(method_idx);
+          const dex::MethodId& method_id = dex_file_->GetMethodId(method_idx);
           dex::TypeIndex return_type_idx =
               dex_file_->GetProtoId(method_id.proto_idx_).return_type_idx_;
           descriptor = dex_file_->StringByTypeIdx(return_type_idx);
@@ -3041,7 +3041,7 @@
       const char* descriptor;
       if (abs_method == nullptr) {
         uint32_t method_idx = (is_range) ? inst->VRegB_3rc() : inst->VRegB_35c();
-        const DexFile::MethodId& method_id = dex_file_->GetMethodId(method_idx);
+        const dex::MethodId& method_id = dex_file_->GetMethodId(method_idx);
         dex::TypeIndex return_type_idx =
             dex_file_->GetProtoId(method_id.proto_idx_).return_type_idx_;
         descriptor = dex_file_->StringByTypeIdx(return_type_idx);
@@ -3106,7 +3106,7 @@
       // method handle produced by step 1. The dex file verifier has checked ranges for
       // the first three arguments and CheckCallSite has checked the method handle type.
       const dex::ProtoIndex proto_idx = dex_file_->GetProtoIndexForCallSite(call_site_idx);
-      const DexFile::ProtoId& proto_id = dex_file_->GetProtoId(proto_idx);
+      const dex::ProtoId& proto_id = dex_file_->GetProtoId(proto_idx);
       DexFileParameterIterator param_it(*dex_file_, proto_id);
       // Treat method as static as it has yet to be determined.
       VerifyInvocationArgsFromIterator(&param_it, inst, METHOD_STATIC, is_range, nullptr);
@@ -3497,7 +3497,7 @@
    */
   if ((opcode_flags & Instruction::kThrow) != 0 && GetInstructionFlags(work_insn_idx_).IsInTry()) {
     bool has_catch_all_handler = false;
-    const DexFile::TryItem* try_item = code_item_accessor_.FindTryItem(work_insn_idx_);
+    const dex::TryItem* try_item = code_item_accessor_.FindTryItem(work_insn_idx_);
     CHECK(try_item != nullptr);
     CatchHandlerIterator iterator(code_item_accessor_, *try_item);
 
@@ -3749,7 +3749,7 @@
 
 ArtMethod* MethodVerifier::ResolveMethodAndCheckAccess(
     uint32_t dex_method_idx, MethodType method_type) {
-  const DexFile::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx);
+  const dex::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx);
   const RegType& klass_type = ResolveClass<CheckAccess::kYes>(method_id.class_idx_);
   if (klass_type.IsConflict()) {
     std::string append(" in attempt to access method ");
@@ -4093,7 +4093,7 @@
   }
 
   // Check method handle kind is valid.
-  const DexFile::MethodHandleItem& mh = dex_file_->GetMethodHandle(index[0]);
+  const dex::MethodHandleItem& mh = dex_file_->GetMethodHandle(index[0]);
   if (mh.method_handle_type_ != static_cast<uint16_t>(DexFile::MethodHandleType::kInvokeStatic)) {
     Fail(VERIFY_ERROR_BAD_CLASS_HARD) << "Call site #" << call_site_idx
                                       << " argument 0 method handle type is not InvokeStatic: "
@@ -4125,7 +4125,7 @@
  private:
   ArtMethod* res_method_;
   size_t pos_;
-  const DexFile::TypeList* params_;
+  const dex::TypeList* params_;
   const size_t params_size_;
 };
 
@@ -4231,7 +4231,7 @@
     return false;
   }
 
-  const DexFile::TypeList* types = method->GetParameterTypeList();
+  const dex::TypeList* types = method->GetParameterTypeList();
   if (types->Size() != 1) {
     Fail(VERIFY_ERROR_BAD_CLASS_HARD)
         << "Signature polymorphic method has too many arguments " << types->Size() << " != 1";
@@ -4553,7 +4553,7 @@
 }
 
 ArtField* MethodVerifier::GetStaticField(int field_idx) {
-  const DexFile::FieldId& field_id = dex_file_->GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file_->GetFieldId(field_idx);
   // Check access to class
   const RegType& klass_type = ResolveClass<CheckAccess::kYes>(field_id.class_idx_);
   if (klass_type.IsConflict()) {  // bad class
@@ -4596,7 +4596,7 @@
 }
 
 ArtField* MethodVerifier::GetInstanceField(const RegType& obj_type, int field_idx) {
-  const DexFile::FieldId& field_id = dex_file_->GetFieldId(field_idx);
+  const dex::FieldId& field_id = dex_file_->GetFieldId(field_idx);
   // Check access to class.
   const RegType& klass_type = ResolveClass<CheckAccess::kYes>(field_id.class_idx_);
   if (klass_type.IsConflict()) {
@@ -4756,7 +4756,7 @@
     //
     // Note: see b/34966607. This and above may be changed in the future.
     if (kAccType == FieldAccessType::kAccPut) {
-      const DexFile::FieldId& field_id = dex_file_->GetFieldId(field_idx);
+      const dex::FieldId& field_id = dex_file_->GetFieldId(field_idx);
       const char* field_class_descriptor = dex_file_->GetFieldDeclaringClassDescriptor(field_id);
       const RegType* field_class_type = &reg_types_.FromDescriptor(GetClassLoader(),
                                                                    field_class_descriptor,
@@ -4772,7 +4772,7 @@
     }
   }
   if (field_type == nullptr) {
-    const DexFile::FieldId& field_id = dex_file_->GetFieldId(field_idx);
+    const dex::FieldId& field_id = dex_file_->GetFieldId(field_idx);
     const char* descriptor = dex_file_->GetFieldTypeDescriptor(field_id);
     field_type = &reg_types_.FromDescriptor(GetClassLoader(), descriptor, false);
   }
@@ -4935,8 +4935,8 @@
       }
     }
     if (return_type_ == nullptr) {
-      const DexFile::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
-      const DexFile::ProtoId& proto_id = dex_file_->GetMethodPrototype(method_id);
+      const dex::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
+      const dex::ProtoId& proto_id = dex_file_->GetMethodPrototype(method_id);
       dex::TypeIndex return_type_idx = proto_id.return_type_idx_;
       const char* descriptor = dex_file_->GetTypeDescriptor(dex_file_->GetTypeId(return_type_idx));
       return_type_ = &reg_types_.FromDescriptor(GetClassLoader(), descriptor, false);
@@ -4947,7 +4947,7 @@
 
 const RegType& MethodVerifier::GetDeclaringClass() {
   if (declaring_class_ == nullptr) {
-    const DexFile::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
+    const dex::MethodId& method_id = dex_file_->GetMethodId(dex_method_idx_);
     const char* descriptor
         = dex_file_->GetTypeDescriptor(dex_file_->GetTypeId(method_id.class_idx_));
     if (method_being_verified_ != nullptr) {
diff --git a/runtime/verifier/method_verifier.h b/runtime/verifier/method_verifier.h
index eef2280..c178df0 100644
--- a/runtime/verifier/method_verifier.h
+++ b/runtime/verifier/method_verifier.h
@@ -26,7 +26,6 @@
 #include "base/scoped_arena_containers.h"
 #include "base/value_object.h"
 #include "dex/code_item_accessors.h"
-#include "dex/dex_file.h"
 #include "dex/dex_file_types.h"
 #include "dex/method_reference.h"
 #include "handle.h"
@@ -39,11 +38,17 @@
 
 class ClassLinker;
 class CompilerCallbacks;
+class DexFile;
 class Instruction;
 struct ReferenceMap2Visitor;
 class Thread;
 class VariableIndentationOutputStream;
 
+namespace dex {
+struct ClassDef;
+struct CodeItem;
+}  // namespace dex
+
 namespace mirror {
 class DexCache;
 }  // namespace mirror
@@ -107,7 +112,7 @@
                                  const DexFile* dex_file,
                                  Handle<mirror::DexCache> dex_cache,
                                  Handle<mirror::ClassLoader> class_loader,
-                                 const DexFile::ClassDef& class_def,
+                                 const dex::ClassDef& class_def,
                                  CompilerCallbacks* callbacks,
                                  bool allow_soft_failures,
                                  HardFailLogMode log_level,
@@ -121,8 +126,8 @@
                                              const DexFile* dex_file,
                                              Handle<mirror::DexCache> dex_cache,
                                              Handle<mirror::ClassLoader> class_loader,
-                                             const DexFile::ClassDef& class_def,
-                                             const DexFile::CodeItem* code_item, ArtMethod* method,
+                                             const dex::ClassDef& class_def,
+                                             const dex::CodeItem* code_item, ArtMethod* method,
                                              uint32_t method_access_flags,
                                              uint32_t api_level)
       REQUIRES_SHARED(Locks::mutator_lock_);
@@ -238,8 +243,8 @@
                  const DexFile* dex_file,
                  Handle<mirror::DexCache> dex_cache,
                  Handle<mirror::ClassLoader> class_loader,
-                 const DexFile::ClassDef& class_def,
-                 const DexFile::CodeItem* code_item,
+                 const dex::ClassDef& class_def,
+                 const dex::CodeItem* code_item,
                  uint32_t method_idx,
                  ArtMethod* method,
                  uint32_t access_flags,
@@ -297,8 +302,8 @@
                                   const DexFile* dex_file,
                                   Handle<mirror::DexCache> dex_cache,
                                   Handle<mirror::ClassLoader> class_loader,
-                                  const DexFile::ClassDef& class_def_idx,
-                                  const DexFile::CodeItem* code_item,
+                                  const dex::ClassDef& class_def_idx,
+                                  const dex::CodeItem* code_item,
                                   ArtMethod* method,
                                   uint32_t method_access_flags,
                                   CompilerCallbacks* callbacks,
@@ -716,7 +721,7 @@
   Handle<mirror::DexCache> dex_cache_ GUARDED_BY(Locks::mutator_lock_);
   // The class loader for the declaring class of the method.
   Handle<mirror::ClassLoader> class_loader_ GUARDED_BY(Locks::mutator_lock_);
-  const DexFile::ClassDef& class_def_;  // The class def of the declaring class of the method.
+  const dex::ClassDef& class_def_;  // The class def of the declaring class of the method.
   const CodeItemDataAccessor code_item_accessor_;
   const RegType* declaring_class_;  // Lazily computed reg type of the method's declaring class.
   // Instruction widths and flags, one entry per code unit.
diff --git a/runtime/verifier/method_verifier_test.cc b/runtime/verifier/method_verifier_test.cc
index 7519257..36890a6 100644
--- a/runtime/verifier/method_verifier_test.cc
+++ b/runtime/verifier/method_verifier_test.cc
@@ -57,7 +57,7 @@
       REQUIRES_SHARED(Locks::mutator_lock_) {
     // Verify all the classes defined in this file
     for (size_t i = 0; i < dex.NumClassDefs(); i++) {
-      const DexFile::ClassDef& class_def = dex.GetClassDef(i);
+      const dex::ClassDef& class_def = dex.GetClassDef(i);
       const char* descriptor = dex.GetClassDescriptor(class_def);
       VerifyClass(descriptor);
     }
diff --git a/runtime/verifier/verifier_deps.cc b/runtime/verifier/verifier_deps.cc
index d346a95..bdcadd9 100644
--- a/runtime/verifier/verifier_deps.cc
+++ b/runtime/verifier/verifier_deps.cc
@@ -99,9 +99,9 @@
     DCHECK(dex_cache != nullptr) << klass->PrettyClass();
     if (dex_cache->GetDexFile() == &dex_file) {
       // FindStringId is slow, try to go through the class def if we have one.
-      const DexFile::ClassDef* class_def = klass->GetClassDef();
+      const dex::ClassDef* class_def = klass->GetClassDef();
       DCHECK(class_def != nullptr) << klass->PrettyClass();
-      const DexFile::TypeId& type_id = dex_file.GetTypeId(class_def->class_idx_);
+      const dex::TypeId& type_id = dex_file.GetTypeId(class_def->class_idx_);
       if (kIsDebugBuild) {
         std::string temp;
         CHECK_EQ(GetIdFromString(dex_file, klass->GetDescriptor(&temp)), type_id.descriptor_idx_);
@@ -119,9 +119,9 @@
                                                       ObjPtr<mirror::Class> klass)
     REQUIRES_SHARED(Locks::mutator_lock_) {
   if (!klass->IsArrayClass()) {
-    const DexFile::TypeId& type_id = dex_file.GetTypeId(type_idx);
+    const dex::TypeId& type_id = dex_file.GetTypeId(type_idx);
     const DexFile& klass_dex = klass->GetDexFile();
-    const DexFile::TypeId& klass_type_id = klass_dex.GetTypeId(klass->GetClassDef()->class_idx_);
+    const dex::TypeId& klass_type_id = klass_dex.GetTypeId(klass->GetClassDef()->class_idx_);
     if (strcmp(dex_file.GetTypeDescriptor(type_id),
                klass_dex.GetTypeDescriptor(klass_type_id)) == 0) {
       return type_id.descriptor_idx_;
@@ -201,7 +201,7 @@
 }
 
 dex::StringIndex VerifierDeps::GetIdFromString(const DexFile& dex_file, const std::string& str) {
-  const DexFile::StringId* string_id = dex_file.FindStringId(str.c_str());
+  const dex::StringId* string_id = dex_file.FindStringId(str.c_str());
   if (string_id != nullptr) {
     // String is in the DEX file. Return its ID.
     return dex_file.GetIndexForStringId(*string_id);
@@ -805,7 +805,7 @@
     }
 
     for (const FieldResolution& entry : dep.second->fields_) {
-      const DexFile::FieldId& field_id = dex_file.GetFieldId(entry.GetDexFieldIndex());
+      const dex::FieldId& field_id = dex_file.GetFieldId(entry.GetDexFieldIndex());
       vios->Stream()
           << dex_file.GetFieldDeclaringClassDescriptor(field_id) << "->"
           << dex_file.GetFieldName(field_id) << ":"
@@ -823,7 +823,7 @@
     }
 
     for (const MethodResolution& method : dep.second->methods_) {
-      const DexFile::MethodId& method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
+      const dex::MethodId& method_id = dex_file.GetMethodId(method.GetDexMethodIndex());
       vios->Stream()
           << dex_file.GetMethodDeclaringClassDescriptor(method_id) << "->"
           << dex_file.GetMethodName(method_id)
@@ -949,7 +949,7 @@
 }
 
 static std::string GetFieldDescription(const DexFile& dex_file, uint32_t index) {
-  const DexFile::FieldId& field_id = dex_file.GetFieldId(index);
+  const dex::FieldId& field_id = dex_file.GetFieldId(index);
   return std::string(dex_file.GetFieldDeclaringClassDescriptor(field_id))
       + "->"
       + dex_file.GetFieldName(field_id)
@@ -965,7 +965,7 @@
   // and have the same recorded flags.
   ClassLinker* class_linker = Runtime::Current()->GetClassLinker();
   for (const auto& entry : fields) {
-    const DexFile::FieldId& field_id = dex_file.GetFieldId(entry.GetDexFieldIndex());
+    const dex::FieldId& field_id = dex_file.GetFieldId(entry.GetDexFieldIndex());
     StringPiece name(dex_file.StringDataByIdx(field_id.name_idx_));
     StringPiece type(dex_file.StringDataByIdx(dex_file.GetTypeId(field_id.type_idx_).descriptor_idx_));
     // Only use field_id.class_idx_ when the entry is unresolved, which is rare.
@@ -1011,7 +1011,7 @@
 }
 
 static std::string GetMethodDescription(const DexFile& dex_file, uint32_t index) {
-  const DexFile::MethodId& method_id = dex_file.GetMethodId(index);
+  const dex::MethodId& method_id = dex_file.GetMethodId(index);
   return std::string(dex_file.GetMethodDeclaringClassDescriptor(method_id))
       + "->"
       + dex_file.GetMethodName(method_id)
@@ -1026,7 +1026,7 @@
   PointerSize pointer_size = class_linker->GetImagePointerSize();
 
   for (const auto& entry : methods) {
-    const DexFile::MethodId& method_id = dex_file.GetMethodId(entry.GetDexMethodIndex());
+    const dex::MethodId& method_id = dex_file.GetMethodId(entry.GetDexMethodIndex());
 
     const char* name = dex_file.GetMethodName(method_id);
     const Signature signature = dex_file.GetMethodSignature(method_id);