Move mirror::ArtMethod to native

Optimizing + quick tests are passing, devices boot.

TODO: Test and fix bugs in mips64.

Saves 16 bytes per most ArtMethod, 7.5MB reduction in system PSS.
Some of the savings are from removal of virtual methods and direct
methods object arrays.

Bug: 19264997
Change-Id: I622469a0cfa0e7082a2119f3d6a9491eb61e3f3d
diff --git a/imgdiag/imgdiag.cc b/imgdiag/imgdiag.cc
index 1056fe1..f324881 100644
--- a/imgdiag/imgdiag.cc
+++ b/imgdiag/imgdiag.cc
@@ -24,13 +24,13 @@
 #include <set>
 #include <map>
 
+#include "art_method-inl.h"
 #include "base/unix_file/fd_file.h"
 #include "base/stringprintf.h"
 #include "gc/space/image_space.h"
 #include "gc/heap.h"
 #include "mirror/class-inl.h"
 #include "mirror/object-inl.h"
-#include "mirror/art_method-inl.h"
 #include "image.h"
 #include "scoped_thread_state_change.h"
 #include "os.h"
@@ -171,9 +171,8 @@
 
     const uint8_t* image_begin_unaligned = boot_image_header.GetImageBegin();
     const uint8_t* image_mirror_end_unaligned = image_begin_unaligned +
-        boot_image_header.GetImageSize();
-    const uint8_t* image_end_unaligned = image_mirror_end_unaligned +
-        boot_image_header.GetArtFieldsSize();
+        boot_image_header.GetImageSection(ImageHeader::kSectionObjects).Size();
+    const uint8_t* image_end_unaligned = image_begin_unaligned + boot_image_header.GetImageSize();
 
     // Adjust range to nearest page
     const uint8_t* image_begin = AlignDown(image_begin_unaligned, kPageSize);
@@ -335,7 +334,7 @@
     std::map<mirror::Class*, std::string> class_to_descriptor_map;
 
     std::map<off_t /* field offset */, int /* count */> art_method_field_dirty_count;
-    std::vector<mirror::ArtMethod*> art_method_dirty_objects;
+    std::vector<ArtMethod*> art_method_dirty_objects;
 
     std::map<off_t /* field offset */, int /* count */> class_field_dirty_count;
     std::vector<mirror::Class*> class_dirty_objects;
@@ -437,7 +436,7 @@
             class_dirty_objects.push_back(obj_as_class);
           } else if (strcmp(descriptor.c_str(), "Ljava/lang/reflect/ArtMethod;") == 0) {
             // this is an ArtMethod
-            mirror::ArtMethod* art_method = reinterpret_cast<mirror::ArtMethod*>(remote_obj);
+            ArtMethod* art_method = reinterpret_cast<ArtMethod*>(remote_obj);
 
             // print the fields that are dirty
             for (size_t i = 0; i < obj->SizeOf(); ++i) {
@@ -533,7 +532,7 @@
         const auto& dirty_objects_list = dirty_objects_by_class[klass];
         for (mirror::Object* obj : dirty_objects_list) {
           // remote method
-          auto art_method = reinterpret_cast<mirror::ArtMethod*>(obj);
+          auto art_method = reinterpret_cast<ArtMethod*>(obj);
 
           // remote class
           mirror::Class* remote_declaring_class =
@@ -551,7 +550,7 @@
                     art_method->GetEntryPointFromJniPtrSize(pointer_size)) << ", ";
           os << "  entryPointFromInterpreter: "
              << reinterpret_cast<const void*>(
-                    art_method->GetEntryPointFromInterpreterPtrSize<kVerifyNone>(pointer_size))
+                    art_method->GetEntryPointFromInterpreterPtrSize(pointer_size))
              << ", ";
           os << "  entryPointFromQuickCompiledCode: "
              << reinterpret_cast<const void*>(
@@ -623,7 +622,7 @@
         os << "      field contents:\n";
         for (mirror::Object* obj : art_method_false_dirty_objects) {
           // local method
-          auto art_method = reinterpret_cast<mirror::ArtMethod*>(obj);
+          auto art_method = reinterpret_cast<ArtMethod*>(obj);
 
           // local class
           mirror::Class* declaring_class = art_method->GetDeclaringClass();
@@ -634,7 +633,7 @@
                     art_method->GetEntryPointFromJniPtrSize(pointer_size)) << ", ";
           os << "  entryPointFromInterpreter: "
              << reinterpret_cast<const void*>(
-                    art_method->GetEntryPointFromInterpreterPtrSize<kVerifyNone>(pointer_size))
+                    art_method->GetEntryPointFromInterpreterPtrSize(pointer_size))
              << ", ";
           os << "  entryPointFromQuickCompiledCode: "
              << reinterpret_cast<const void*>(