Version 3.19.15

Performance and stability improvements on all platforms.

git-svn-id: http://v8.googlecode.com/svn/trunk@15120 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
diff --git a/ChangeLog b/ChangeLog
index 907760a..e6a2761 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2013-06-13: Version 3.19.15
+
+        Performance and stability improvements on all platforms.
+
+
 2013-06-13: Version 3.19.14
 
         Fixed crashes when calling new Array(a) with a single argument that
diff --git a/include/v8.h b/include/v8.h
index 6fcc332..d2a5322 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -123,7 +123,6 @@
 class Int32;
 class Integer;
 class Isolate;
-class LocalContext;
 class Number;
 class NumberObject;
 class Object;
@@ -162,8 +161,7 @@
 class HeapObject;
 class Isolate;
 class Object;
-template<typename T>
-class CustomArguments;
+template<typename T> class CustomArguments;
 class PropertyCallbackArguments;
 class FunctionCallbackArguments;
 }
@@ -365,21 +363,19 @@
 #endif
 
  private:
+  friend class Utils;
   template<class F> friend class Persistent;
   template<class F> friend class Local;
   friend class Arguments;
   template<class F> friend class FunctionCallbackInfo;
   template<class F> friend class PropertyCallbackInfo;
-  friend class String;
-  friend class Object;
+  template<class F> friend class internal::CustomArguments;
   friend class AccessorInfo;
   friend Handle<Primitive> Undefined(Isolate* isolate);
   friend Handle<Primitive> Null(Isolate* isolate);
   friend Handle<Boolean> True(Isolate* isolate);
   friend Handle<Boolean> False(Isolate* isolate);
   friend class Context;
-  friend class InternalHandleHelper;
-  friend class LocalContext;
   friend class HandleScope;
 
 #ifndef V8_USE_UNSAFE_HANDLES
@@ -454,6 +450,7 @@
 #endif
 
  private:
+  friend class Utils;
   template<class F> friend class Persistent;
   template<class F> friend class Handle;
   friend class Arguments;
@@ -463,8 +460,7 @@
   friend class Object;
   friend class AccessorInfo;
   friend class Context;
-  friend class InternalHandleHelper;
-  friend class LocalContext;
+  template<class F> friend class internal::CustomArguments;
   friend class HandleScope;
 
   V8_INLINE(static Local<T> New(Isolate* isolate, T* that));
@@ -511,11 +507,11 @@
    * to be separately disposed.
    */
   template <class S> V8_INLINE(Persistent(Isolate* isolate, Handle<S> that))
-      : val_(*New(isolate, that)) { }
+      : val_(New(isolate, *that)) { }
 
   template <class S> V8_INLINE(Persistent(Isolate* isolate,
                                           Persistent<S>& that)) // NOLINT
-      : val_(*New(isolate, that)) { }
+      : val_(New(isolate, *that)) { }
 
 #else
   /**
@@ -594,15 +590,9 @@
   }
 #endif
 
+#ifdef V8_USE_UNSAFE_HANDLES
   V8_DEPRECATED(static Persistent<T> New(Handle<T> that));
-
-  /**
-   * Creates a new persistent handle for an existing local or persistent handle.
-   */
-  // TODO(dcarney): remove before cutover
   V8_INLINE(static Persistent<T> New(Isolate* isolate, Handle<T> that));
-#ifndef V8_USE_UNSAFE_HANDLES
-  // TODO(dcarney): remove before cutover
   V8_INLINE(static Persistent<T> New(Isolate* isolate, Persistent<T> that));
 #endif
 
@@ -652,23 +642,17 @@
       P* parameters,
       typename WeakReferenceCallbacks<T, P>::Revivable callback));
 
-  // TODO(dcarney): deprecate
   template<typename S, typename P>
-  V8_INLINE(void MakeWeak(
+  V8_DEPRECATED(void MakeWeak(
       Isolate* isolate,
       P* parameters,
-      typename WeakReferenceCallbacks<S, P>::Revivable callback)) {
-    MakeWeak<S, P>(parameters, callback);
-  }
+      typename WeakReferenceCallbacks<S, P>::Revivable callback));
 
-  // TODO(dcarney): deprecate
   template<typename P>
-  V8_INLINE(void MakeWeak(
+  V8_DEPRECATED(void MakeWeak(
       Isolate* isolate,
       P* parameters,
-      typename WeakReferenceCallbacks<T, P>::Revivable callback)) {
-    MakeWeak<P>(parameters, callback);
-  }
+      typename WeakReferenceCallbacks<T, P>::Revivable callback));
 
   V8_INLINE(void ClearWeak());
 
@@ -779,11 +763,7 @@
 #endif
   // TODO(dcarney): remove before cutover
   template <class S> V8_INLINE(Persistent(S* that)) : val_(that) { }
-  // TODO(dcarney): remove before cutover
-  template <class S> V8_INLINE(Persistent(Persistent<S> that))
-      : val_(*that) {
-    TYPE_CHECK(T, S);
-  }
+
   // TODO(dcarney): remove before cutover
   V8_INLINE(T* operator*() const) { return val_; }
 
@@ -794,16 +774,13 @@
 #endif
 
  private:
+  friend class Utils;
   template<class F> friend class Handle;
   template<class F> friend class Local;
+  template<class F> friend class Persistent;
   template<class F> friend class ReturnValue;
-  friend class ImplementationUtilities;
-  friend class ObjectTemplate;
-  friend class Context;
-  friend class InternalHandleHelper;
-  friend class LocalContext;
 
-  V8_INLINE(static Persistent<T> New(Isolate* isolate, T* that));
+  V8_INLINE(static T* New(Isolate* isolate, T* that));
 
 #ifndef V8_USE_UNSAFE_HANDLES
   T* val_;
@@ -5510,6 +5487,7 @@
 }
 
 
+#ifdef V8_USE_UNSAFE_HANDLES
 template <class T>
 Persistent<T> Persistent<T>::New(Handle<T> that) {
   return New(Isolate::GetCurrent(), that.val_);
@@ -5521,20 +5499,20 @@
   return New(Isolate::GetCurrent(), that.val_);
 }
 
-#ifndef V8_USE_UNSAFE_HANDLES
 template <class T>
 Persistent<T> Persistent<T>::New(Isolate* isolate, Persistent<T> that) {
   return New(Isolate::GetCurrent(), that.val_);
 }
 #endif
 
+
 template <class T>
-Persistent<T> Persistent<T>::New(Isolate* isolate, T* that) {
-  if (that == NULL) return Persistent<T>();
+T* Persistent<T>::New(Isolate* isolate, T* that) {
+  if (that == NULL) return NULL;
   internal::Object** p = reinterpret_cast<internal::Object**>(that);
-  return Persistent<T>(reinterpret_cast<T*>(
+  return reinterpret_cast<T*>(
       V8::GlobalizeReference(reinterpret_cast<internal::Isolate*>(isolate),
-                             p)));
+                             p));
 }
 
 
@@ -5598,6 +5576,26 @@
 
 
 template <class T>
+template <typename S, typename P>
+void Persistent<T>::MakeWeak(
+    Isolate* isolate,
+    P* parameters,
+    typename WeakReferenceCallbacks<S, P>::Revivable callback) {
+  MakeWeak<S, P>(parameters, callback);
+}
+
+
+template <class T>
+template<typename P>
+void Persistent<T>::MakeWeak(
+    Isolate* isolate,
+    P* parameters,
+    typename WeakReferenceCallbacks<T, P>::Revivable callback) {
+  MakeWeak<P>(parameters, callback);
+}
+
+
+template <class T>
 void Persistent<T>::ClearWeak() {
   V8::ClearWeak(reinterpret_cast<internal::Object**>(this->val_));
 }
diff --git a/src/api.cc b/src/api.cc
index 5491971..a7e0b28 100644
--- a/src/api.cc
+++ b/src/api.cc
@@ -552,8 +552,7 @@
   if (!EnsureInitializedForIsolate(isolate, "v8::Undefined()")) {
     return v8::Handle<v8::Primitive>();
   }
-  return v8::Handle<Primitive>(ToApi<Primitive>(
-      isolate->factory()->undefined_value()));
+  return ToApiHandle<Primitive>(isolate->factory()->undefined_value());
 }
 
 
@@ -562,8 +561,7 @@
   if (!EnsureInitializedForIsolate(isolate, "v8::Null()")) {
     return v8::Handle<v8::Primitive>();
   }
-  return v8::Handle<Primitive>(
-      ToApi<Primitive>(isolate->factory()->null_value()));
+  return ToApiHandle<Primitive>(isolate->factory()->null_value());
 }
 
 
@@ -572,8 +570,7 @@
   if (!EnsureInitializedForIsolate(isolate, "v8::True()")) {
     return v8::Handle<Boolean>();
   }
-  return v8::Handle<Boolean>(
-      ToApi<Boolean>(isolate->factory()->true_value()));
+  return ToApiHandle<Boolean>(isolate->factory()->true_value());
 }
 
 
@@ -582,8 +579,7 @@
   if (!EnsureInitializedForIsolate(isolate, "v8::False()")) {
     return v8::Handle<Boolean>();
   }
-  return v8::Handle<Boolean>(
-      ToApi<Boolean>(isolate->factory()->false_value()));
+  return ToApiHandle<Boolean>(isolate->factory()->false_value());
 }
 
 
@@ -953,7 +949,7 @@
     result = Utils::OpenHandle(*ObjectTemplate::New());
     Utils::OpenHandle(this)->set_prototype_template(*result);
   }
-  return Local<ObjectTemplate>(ToApi<ObjectTemplate>(result));
+  return ToApiHandle<ObjectTemplate>(result);
 }
 
 
@@ -1048,8 +1044,7 @@
 static Local<Operation> NewDescriptor(
     Isolate* isolate,
     const i::DeclaredAccessorDescriptorData& data,
-    Data* previous_descriptor
-    ) {
+    Data* previous_descriptor) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(isolate);
   i::Handle<i::DeclaredAccessorDescriptor> previous =
       i::Handle<i::DeclaredAccessorDescriptor>();
@@ -1059,8 +1054,7 @@
   }
   i::Handle<i::DeclaredAccessorDescriptor> descriptor =
       i::DeclaredAccessorDescriptor::Create(internal_isolate, data, previous);
-  return Local<Operation>(
-      reinterpret_cast<Operation*>(*Utils::ToLocal(descriptor)));
+  return Utils::Convert<i::DeclaredAccessorDescriptor, Operation>(descriptor);
 }
 
 
@@ -1301,13 +1295,14 @@
       || EmptyCheck("v8::FunctionTemplate::InstanceTemplate()", this))
     return Local<ObjectTemplate>();
   ENTER_V8(isolate);
-  if (Utils::OpenHandle(this)->instance_template()->IsUndefined()) {
+  i::Handle<i::FunctionTemplateInfo> handle = Utils::OpenHandle(this);
+  if (handle->instance_template()->IsUndefined()) {
     Local<ObjectTemplate> templ =
-        ObjectTemplate::New(v8::Handle<FunctionTemplate>(this));
-    Utils::OpenHandle(this)->set_instance_template(*Utils::OpenHandle(*templ));
+        ObjectTemplate::New(ToApiHandle<FunctionTemplate>(handle));
+    handle->set_instance_template(*Utils::OpenHandle(*templ));
   }
-  i::Handle<i::ObjectTemplateInfo> result(i::ObjectTemplateInfo::cast(
-        Utils::OpenHandle(this)->instance_template()));
+  i::Handle<i::ObjectTemplateInfo> result(
+      i::ObjectTemplateInfo::cast(handle->instance_template()));
   return Utils::ToLocal(result);
 }
 
@@ -1905,7 +1900,7 @@
     raw_result = *result;
   }
   i::Handle<i::SharedFunctionInfo> result(raw_result, isolate);
-  return Local<Script>(ToApi<Script>(result));
+  return ToApiHandle<Script>(result);
 }
 
 
@@ -1934,7 +1929,7 @@
       isolate->factory()->NewFunctionFromSharedFunctionInfo(
           function,
           isolate->global_context());
-  return Local<Script>(ToApi<Script>(result));
+  return ToApiHandle<Script>(result);
 }
 
 
@@ -2777,7 +2772,7 @@
     str = i::Execution::ToString(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<String>());
   }
-  return Local<String>(ToApi<String>(str));
+  return ToApiHandle<String>(str);
 }
 
 
@@ -2797,7 +2792,7 @@
     str = i::Execution::ToDetailString(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<String>());
   }
-  return Local<String>(ToApi<String>(str));
+  return ToApiHandle<String>(str);
 }
 
 
@@ -2817,14 +2812,14 @@
     val = i::Execution::ToObject(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<v8::Object>());
   }
-  return Local<v8::Object>(ToApi<Object>(val));
+  return ToApiHandle<Object>(val);
 }
 
 
 Local<Boolean> Value::ToBoolean() const {
   i::Handle<i::Object> obj = Utils::OpenHandle(this);
   if (obj->IsBoolean()) {
-    return Local<Boolean>(ToApi<Boolean>(obj));
+    return ToApiHandle<Boolean>(obj);
   } else {
     i::Isolate* isolate = i::Isolate::Current();
     if (IsDeadCheck(isolate, "v8::Value::ToBoolean()")) {
@@ -2834,7 +2829,7 @@
     ENTER_V8(isolate);
     i::Handle<i::Object> val =
         isolate->factory()->ToBoolean(obj->BooleanValue());
-    return Local<Boolean>(ToApi<Boolean>(val));
+    return ToApiHandle<Boolean>(val);
   }
 }
 
@@ -2855,7 +2850,7 @@
     num = i::Execution::ToNumber(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<Number>());
   }
-  return Local<Number>(ToApi<Number>(num));
+  return ToApiHandle<Number>(num);
 }
 
 
@@ -2873,7 +2868,7 @@
     num = i::Execution::ToInteger(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<Integer>());
   }
-  return Local<Integer>(ToApi<Integer>(num));
+  return ToApiHandle<Integer>(num);
 }
 
 
@@ -3103,7 +3098,7 @@
     num = i::Execution::ToInt32(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<Int32>());
   }
-  return Local<Int32>(ToApi<Int32>(num));
+  return ToApiHandle<Int32>(num);
 }
 
 
@@ -3121,7 +3116,7 @@
     num = i::Execution::ToUint32(obj, &has_pending_exception);
     EXCEPTION_BAILOUT_CHECK(isolate, Local<Uint32>());
   }
-  return Local<Uint32>(ToApi<Uint32>(num));
+  return ToApiHandle<Uint32>(num);
 }
 
 
@@ -5363,7 +5358,7 @@
   return env;
 }
 
-
+#ifdef V8_USE_UNSAFE_HANDLES
 Persistent<Context> v8::Context::New(
     v8::ExtensionConfiguration* extensions,
     v8::Handle<ObjectTemplate> global_template,
@@ -5380,6 +5375,7 @@
   if (env.is_null()) return Persistent<Context>();
   return Persistent<Context>::New(external_isolate, Utils::ToLocal(env));
 }
+#endif
 
 
 Local<Context> v8::Context::New(
@@ -6553,24 +6549,27 @@
                                UniqueId id) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
   internal_isolate->global_handles()->SetObjectGroupId(
-      reinterpret_cast<i::Object**>(*object), id);
+      Utils::OpenPersistent(object).location(),
+      id);
 }
 
 
 void Isolate::SetReferenceFromGroup(UniqueId id,
                                     const Persistent<Value>& object) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
-  internal_isolate->global_handles()
-      ->SetReferenceFromGroup(id, reinterpret_cast<i::Object**>(*object));
+  internal_isolate->global_handles()->SetReferenceFromGroup(
+      id,
+      Utils::OpenPersistent(object).location());
 }
 
 
 void Isolate::SetReference(const Persistent<Object>& parent,
                            const Persistent<Value>& child) {
   i::Isolate* internal_isolate = reinterpret_cast<i::Isolate*>(this);
+  i::Object** parent_location = Utils::OpenPersistent(parent).location();
   internal_isolate->global_handles()->SetReference(
-      i::Handle<i::HeapObject>::cast(Utils::OpenHandle(*parent)).location(),
-      reinterpret_cast<i::Object**>(*child));
+      reinterpret_cast<i::HeapObject**>(parent_location),
+      Utils::OpenPersistent(child).location());
 }
 
 
@@ -7175,12 +7174,12 @@
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
   const i::CodeEntry* entry = node->entry();
   if (!entry->has_name_prefix()) {
-    return Handle<String>(ToApi<String>(
-        isolate->factory()->InternalizeUtf8String(entry->name())));
+    return ToApiHandle<String>(
+        isolate->factory()->InternalizeUtf8String(entry->name()));
   } else {
-    return Handle<String>(ToApi<String>(isolate->factory()->NewConsString(
+    return ToApiHandle<String>(isolate->factory()->NewConsString(
         isolate->factory()->InternalizeUtf8String(entry->name_prefix()),
-        isolate->factory()->InternalizeUtf8String(entry->name()))));
+        isolate->factory()->InternalizeUtf8String(entry->name())));
   }
 }
 
@@ -7189,8 +7188,8 @@
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfileNode::GetScriptResourceName");
   const i::ProfileNode* node = reinterpret_cast<const i::ProfileNode*>(this);
-  return Handle<String>(ToApi<String>(isolate->factory()->InternalizeUtf8String(
-      node->entry()->resource_name())));
+  return ToApiHandle<String>(isolate->factory()->InternalizeUtf8String(
+      node->entry()->resource_name()));
 }
 
 
@@ -7281,8 +7280,8 @@
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::CpuProfile::GetTitle");
   const i::CpuProfile* profile = reinterpret_cast<const i::CpuProfile*>(this);
-  return Handle<String>(ToApi<String>(isolate->factory()->InternalizeUtf8String(
-      profile->title())));
+  return ToApiHandle<String>(isolate->factory()->InternalizeUtf8String(
+      profile->title()));
 }
 
 
@@ -7450,12 +7449,12 @@
     case i::HeapGraphEdge::kInternal:
     case i::HeapGraphEdge::kProperty:
     case i::HeapGraphEdge::kShortcut:
-      return Handle<String>(ToApi<String>(
-          isolate->factory()->InternalizeUtf8String(edge->name())));
+      return ToApiHandle<String>(
+          isolate->factory()->InternalizeUtf8String(edge->name()));
     case i::HeapGraphEdge::kElement:
     case i::HeapGraphEdge::kHidden:
-      return Handle<Number>(ToApi<Number>(
-          isolate->factory()->NewNumberFromInt(edge->index())));
+      return ToApiHandle<Number>(
+          isolate->factory()->NewNumberFromInt(edge->index()));
     default: UNREACHABLE();
   }
   return v8::Undefined();
@@ -7494,8 +7493,8 @@
 Handle<String> HeapGraphNode::GetName() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetName");
-  return Handle<String>(ToApi<String>(isolate->factory()->InternalizeUtf8String(
-      ToInternal(this)->name())));
+  return ToApiHandle<String>(
+      isolate->factory()->InternalizeUtf8String(ToInternal(this)->name()));
 }
 
 
@@ -7532,9 +7531,9 @@
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapGraphNode::GetHeapValue");
   i::Handle<i::HeapObject> object = ToInternal(this)->GetHeapObject();
-  return v8::Handle<Value>(!object.is_null() ?
-                           ToApi<Value>(object) : ToApi<Value>(
-                               isolate->factory()->undefined_value()));
+  return !object.is_null() ?
+      ToApiHandle<Value>(object) :
+      ToApiHandle<Value>(isolate->factory()->undefined_value());
 }
 
 
@@ -7573,8 +7572,8 @@
 Handle<String> HeapSnapshot::GetTitle() const {
   i::Isolate* isolate = i::Isolate::Current();
   IsDeadCheck(isolate, "v8::HeapSnapshot::GetTitle");
-  return Handle<String>(ToApi<String>(isolate->factory()->InternalizeUtf8String(
-      ToInternal(this)->title())));
+  return ToApiHandle<String>(
+      isolate->factory()->InternalizeUtf8String(ToInternal(this)->title()));
 }
 
 
diff --git a/src/api.h b/src/api.h
index 3c141f7..3d1c69c 100644
--- a/src/api.h
+++ b/src/api.h
@@ -273,16 +273,34 @@
 OPEN_HANDLE_LIST(DECLARE_OPEN_HANDLE)
 
 #undef DECLARE_OPEN_HANDLE
+
+  template<class From, class To>
+  static inline Local<To> Convert(v8::internal::Handle<From> obj) {
+    ASSERT(obj.is_null() || !obj->IsTheHole());
+    return Local<To>(reinterpret_cast<To*>(obj.location()));
+  }
+
+  template <class T>
+  static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
+      const v8::Persistent<T>& persistent) {
+    return v8::internal::Handle<v8::internal::Object>(
+        reinterpret_cast<v8::internal::Object**>(persistent.val_));
+  }
+
+  template <class T>
+  static inline v8::internal::Handle<v8::internal::Object> OpenPersistent(
+      v8::Persistent<T>* persistent) {
+    return OpenPersistent(*persistent);
+  }
+
+  template <class From, class To>
+  static inline v8::internal::Handle<To> OpenHandle(v8::Local<From> handle) {
+    return OpenHandle(*handle);
+  }
 };
 
 
 template <class T>
-inline T* ToApi(v8::internal::Handle<v8::internal::Object> obj) {
-  return reinterpret_cast<T*>(obj.location());
-}
-
-
-template <class T>
 v8::internal::Handle<T> v8::internal::Handle<T>::EscapeFrom(
     v8::HandleScope* scope) {
   v8::internal::Handle<T> handle;
@@ -293,31 +311,31 @@
 }
 
 
-class InternalHandleHelper {
- public:
-  template<class From, class To>
-  static inline Local<To> Convert(v8::internal::Handle<From> obj) {
-    return Local<To>(reinterpret_cast<To*>(obj.location()));
-  }
-};
+template <class T>
+inline T* ToApi(v8::internal::Handle<v8::internal::Object> obj) {
+  return reinterpret_cast<T*>(obj.location());
+}
+
+template <class T>
+inline v8::Local<T> ToApiHandle(
+    v8::internal::Handle<v8::internal::Object> obj) {
+  return Utils::Convert<v8::internal::Object, T>(obj);
+}
 
 
 // Implementations of ToLocal
 
 #define MAKE_TO_LOCAL(Name, From, To)                                       \
   Local<v8::To> Utils::Name(v8::internal::Handle<v8::internal::From> obj) { \
-    ASSERT(obj.is_null() || !obj->IsTheHole());                             \
-    return InternalHandleHelper::Convert<v8::internal::From, v8::To>(obj);  \
+    return Convert<v8::internal::From, v8::To>(obj);  \
   }
 
 
 #define MAKE_TO_LOCAL_TYPED_ARRAY(TypedArray, typeConst)                    \
   Local<v8::TypedArray> Utils::ToLocal##TypedArray(                         \
       v8::internal::Handle<v8::internal::JSTypedArray> obj) {               \
-    ASSERT(obj.is_null() || !obj->IsTheHole());                             \
     ASSERT(obj->type() == typeConst);                                       \
-    return InternalHandleHelper::                                           \
-        Convert<v8::internal::JSTypedArray, v8::TypedArray>(obj);           \
+    return Convert<v8::internal::JSTypedArray, v8::TypedArray>(obj);        \
   }
 
 
diff --git a/src/arguments.cc b/src/arguments.cc
index 091d0b9..b15ae7e 100644
--- a/src/arguments.cc
+++ b/src/arguments.cc
@@ -82,7 +82,7 @@
   Object** handle = &this->end()[kReturnValueOffset];
   // Nothing was set, return empty handle as per previous behaviour.
   if ((*handle)->IsTheHole()) return v8::Handle<V>();
-  return v8::Handle<V>(reinterpret_cast<V*>(handle));
+  return Utils::Convert<Object, V>(Handle<Object>(handle));
 }
 
 
diff --git a/src/arm/full-codegen-arm.cc b/src/arm/full-codegen-arm.cc
index 39a4018..468fa77 100644
--- a/src/arm/full-codegen-arm.cc
+++ b/src/arm/full-codegen-arm.cc
@@ -2035,21 +2035,20 @@
       __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
       __ b(&l_next);
 
-      // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
+      // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; }
       __ bind(&l_catch);
       handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
+      __ LoadRoot(r2, Heap::kthrow_stringRootIndex);     // "throw"
       __ ldr(r3, MemOperand(sp, 1 * kPointerSize));      // iter
       __ push(r3);                                       // iter
       __ push(r0);                                       // exception
-      __ mov(r0, r3);                                    // iter
-      __ LoadRoot(r2, Heap::kthrow_stringRootIndex);     // "throw"
-      Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(throw_ic);                                  // iter.throw in r0
       __ jmp(&l_call);
 
-      // try { received = yield result.value }
+      // try { received = %yield result }
+      // Shuffle the received result above a try handler and yield it without
+      // re-boxing.
       __ bind(&l_try);
-      EmitCreateIteratorResult(false);                   // pop and box to r0
+      __ pop(r0);                                        // result
       __ PushTryHandler(StackHandler::CATCH, expr->index());
       const int handler_size = StackHandlerConstants::kSize;
       __ push(r0);                                       // result
@@ -2065,42 +2064,22 @@
       __ bind(&l_resume);                                // received in r0
       __ PopTryHandler();
 
-      // receiver = iter; f = iter.next; arg = received;
+      // receiver = iter; f = 'next'; arg = received;
       __ bind(&l_next);
+      __ LoadRoot(r2, Heap::knext_stringRootIndex);      // "next"
       __ ldr(r3, MemOperand(sp, 1 * kPointerSize));      // iter
       __ push(r3);                                       // iter
       __ push(r0);                                       // received
-      __ mov(r0, r3);                                    // iter
-      __ LoadRoot(r2, Heap::knext_stringRootIndex);      // "next"
-      Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(next_ic);                                   // iter.next in r0
 
-      // result = f.call(receiver, arg);
+      // result = receiver[f](arg);
       __ bind(&l_call);
-      Label l_call_runtime;
-      __ JumpIfSmi(r0, &l_call_runtime);
-      __ CompareObjectType(r0, r1, r1, JS_FUNCTION_TYPE);
-      __ b(ne, &l_call_runtime);
-      __ mov(r1, r0);
-      ParameterCount count(1);
-      __ InvokeFunction(r1, count, CALL_FUNCTION,
-                        NullCallWrapper(), CALL_AS_METHOD);
+      Handle<Code> ic = isolate()->stub_cache()->ComputeKeyedCallInitialize(1);
+      CallIC(ic);
       __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-      __ jmp(&l_loop);
-      __ bind(&l_call_runtime);
-      __ push(r0);
-      __ CallRuntime(Runtime::kCall, 3);
 
-      // val = result.value; if (!result.done) goto l_try;
+      // if (!result.done) goto l_try;
       __ bind(&l_loop);
-      // result.value
       __ push(r0);                                       // save result
-      __ LoadRoot(r2, Heap::kvalue_stringRootIndex);     // "value"
-      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(value_ic);                                  // result.value in r0
-      __ pop(r1);                                        // result
-      __ push(r0);                                       // result.value
-      __ mov(r0, r1);                                    // result
       __ LoadRoot(r2, Heap::kdone_stringRootIndex);      // "done"
       Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(done_ic);                                   // result.done in r0
@@ -2110,7 +2089,10 @@
       __ b(eq, &l_try);
 
       // result.value
-      __ pop(r0);                                        // result.value
+      __ pop(r0);                                        // result
+      __ LoadRoot(r2, Heap::kvalue_stringRootIndex);     // "value"
+      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
+      CallIC(value_ic);                                  // result.value in r0
       context()->DropAndPlug(2, r0);                     // drop iter and g
       break;
     }
diff --git a/src/assert-scope.h b/src/assert-scope.h
index e2ec542..13adbd0 100644
--- a/src/assert-scope.h
+++ b/src/assert-scope.h
@@ -79,7 +79,11 @@
 
  protected:
   PerThreadAssertScopeBase() {
-    data_ = AssertData();
+    data_ = GetAssertData();
+    if (data_ == NULL) {
+      data_ = new PerThreadAssertData();
+      SetThreadLocalData(data_);
+    }
     data_->increment_level();
   }
 
@@ -89,22 +93,22 @@
       ASSERT(data_->get(static_cast<PerThreadAssertType>(i)));
     }
     delete data_;
-    Thread::SetThreadLocal(thread_local_key, NULL);
+    SetThreadLocalData(NULL);
   }
 
-  static PerThreadAssertData* AssertData() {
-    PerThreadAssertData* data = reinterpret_cast<PerThreadAssertData*>(
-            Thread::GetThreadLocal(thread_local_key));
-    if (data == NULL) {
-      data = new PerThreadAssertData();
-      Thread::SetThreadLocal(thread_local_key, data);
-    }
-    return data;
+  static PerThreadAssertData* GetAssertData() {
+    return reinterpret_cast<PerThreadAssertData*>(
+        Thread::GetThreadLocal(thread_local_key));
   }
 
   static Thread::LocalStorageKey thread_local_key;
   PerThreadAssertData* data_;
   friend class Isolate;
+
+ private:
+  static void SetThreadLocalData(PerThreadAssertData* data) {
+    Thread::SetThreadLocal(thread_local_key, data);
+  }
 #endif  // DEBUG
 };
 
@@ -124,7 +128,10 @@
 
   ~PerThreadAssertScope() { data_->set(type, old_state_); }
 
-  static bool IsAllowed() { return AssertData()->get(type); }
+  static bool IsAllowed() {
+    PerThreadAssertData* data = GetAssertData();
+    return data == NULL || data->get(type);
+  }
 
  private:
   bool old_state_;
diff --git a/src/compiler.cc b/src/compiler.cc
index 5de9d96..7b0b921 100644
--- a/src/compiler.cc
+++ b/src/compiler.cc
@@ -1181,16 +1181,7 @@
     Handle<Code> code = info->code();
     if (*code == info->isolate()->builtins()->builtin(Builtins::kLazyCompile))
       return;
-    Handle<String> script_name;
     if (script->name()->IsString()) {
-      script_name = Handle<String>(String::cast(script->name()));
-    } else {
-      Handle<Object> name = GetScriptNameOrSourceURL(script);
-      if (!name.is_null() && name->IsString()) {
-        script_name = Handle<String>::cast(name);
-      }
-    }
-    if (!script_name.is_null()) {
       int line_num = GetScriptLineNumber(script, shared->start_position()) + 1;
       USE(line_num);
       PROFILE(info->isolate(),
@@ -1198,7 +1189,7 @@
                               *code,
                               *shared,
                               info,
-                              String::cast(*script_name),
+                              String::cast(script->name()),
                               line_num));
     } else {
       PROFILE(info->isolate(),
diff --git a/src/d8-debug.cc b/src/d8-debug.cc
index e1d29d9..aac7aab 100644
--- a/src/d8-debug.cc
+++ b/src/d8-debug.cc
@@ -68,7 +68,7 @@
   // Get the toJSONProtocol function on the event and get the JSON format.
   Local<String> to_json_fun_name = String::New("toJSONProtocol");
   Local<Function> to_json_fun =
-      Function::Cast(*event_data->Get(to_json_fun_name));
+      Local<Function>::Cast(event_data->Get(to_json_fun_name));
   Local<Value> event_json = to_json_fun->Call(event_data, 0, NULL);
   if (try_catch.HasCaught()) {
     Shell::ReportException(isolate, &try_catch);
@@ -91,9 +91,9 @@
 
   // Get the debug command processor.
   Local<String> fun_name = String::New("debugCommandProcessor");
-  Local<Function> fun = Function::Cast(*exec_state->Get(fun_name));
+  Local<Function> fun = Local<Function>::Cast(exec_state->Get(fun_name));
   Local<Object> cmd_processor =
-      Object::Cast(*fun->Call(exec_state, 0, NULL));
+      Local<Object>::Cast(fun->Call(exec_state, 0, NULL));
   if (try_catch.HasCaught()) {
     Shell::ReportException(isolate, &try_catch);
     return;
diff --git a/src/d8.cc b/src/d8.cc
index a917dbd..4bfdb51 100644
--- a/src/d8.cc
+++ b/src/d8.cc
@@ -1076,14 +1076,15 @@
 }
 
 static void ReadBufferWeakCallback(v8::Isolate* isolate,
-                                   Persistent<Value>* object,
+                                   Persistent<ArrayBuffer>* array_buffer,
                                    uint8_t* data) {
-  size_t byte_length = ArrayBuffer::Cast(**object)->ByteLength();
+  size_t byte_length =
+      Local<ArrayBuffer>::New(isolate, *array_buffer)->ByteLength();
   isolate->AdjustAmountOfExternalAllocatedMemory(
       -static_cast<intptr_t>(byte_length));
 
   delete[] data;
-  object->Dispose(isolate);
+  array_buffer->Dispose();
 }
 
 void Shell::ReadBuffer(const v8::FunctionCallbackInfo<v8::Value>& args) {
@@ -1103,7 +1104,7 @@
     return;
   }
   Handle<v8::ArrayBuffer> buffer = ArrayBuffer::New(data, length);
-  v8::Persistent<v8::Value> weak_handle(isolate, buffer);
+  v8::Persistent<v8::ArrayBuffer> weak_handle(isolate, buffer);
   weak_handle.MakeWeak(isolate, data, ReadBufferWeakCallback);
   weak_handle.MarkIndependent();
   isolate->AdjustAmountOfExternalAllocatedMemory(length);
diff --git a/src/debug.cc b/src/debug.cc
index 5d26ba2..0ffdd00 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -670,7 +670,7 @@
   ScriptCache* script_cache = reinterpret_cast<ScriptCache*>(data);
   // Find the location of the global handle.
   Script** location =
-      reinterpret_cast<Script**>(Utils::OpenHandle(**obj).location());
+      reinterpret_cast<Script**>(Utils::OpenPersistent(*obj).location());
   ASSERT((*location)->IsScript());
 
   // Remove the entry from the cache.
@@ -3066,13 +3066,14 @@
     v8::Local<v8::String> fun_name =
         v8::String::New("debugCommandProcessor");
     v8::Local<v8::Function> fun =
-        v8::Function::Cast(*api_exec_state->Get(fun_name));
+        v8::Local<v8::Function>::Cast(api_exec_state->Get(fun_name));
 
     v8::Handle<v8::Boolean> running =
         auto_continue ? v8::True() : v8::False();
     static const int kArgc = 1;
     v8::Handle<Value> argv[kArgc] = { running };
-    cmd_processor = v8::Object::Cast(*fun->Call(api_exec_state, kArgc, argv));
+    cmd_processor = v8::Local<v8::Object>::Cast(
+        fun->Call(api_exec_state, kArgc, argv));
     if (try_catch.HasCaught()) {
       PrintLn(try_catch.Exception());
       return;
@@ -3112,7 +3113,7 @@
     v8::Local<v8::Value> request;
     v8::TryCatch try_catch;
     fun_name = v8::String::New("processDebugRequest");
-    fun = v8::Function::Cast(*cmd_processor->Get(fun_name));
+    fun = v8::Local<v8::Function>::Cast(cmd_processor->Get(fun_name));
 
     request = v8::String::New(command.text().start(),
                               command.text().length());
@@ -3125,7 +3126,7 @@
     if (!try_catch.HasCaught()) {
       // Get response string.
       if (!response_val->IsUndefined()) {
-        response = v8::String::Cast(*response_val);
+        response = v8::Local<v8::String>::Cast(response_val);
       } else {
         response = v8::String::New("");
       }
@@ -3138,7 +3139,7 @@
 
       // Get the running state.
       fun_name = v8::String::New("isRunning");
-      fun = v8::Function::Cast(*cmd_processor->Get(fun_name));
+      fun = v8::Local<v8::Function>::Cast(cmd_processor->Get(fun_name));
       static const int kArgc = 1;
       v8::Handle<Value> argv[kArgc] = { response };
       v8::Local<v8::Value> running_val = fun->Call(cmd_processor, kArgc, argv);
diff --git a/src/handles.cc b/src/handles.cc
index 658bb2a..6859cd4 100644
--- a/src/handles.cc
+++ b/src/handles.cc
@@ -347,7 +347,7 @@
 static void ClearWrapperCache(v8::Isolate* v8_isolate,
                               Persistent<v8::Value>* handle,
                               void*) {
-  Handle<Object> cache = Utils::OpenHandle(**handle);
+  Handle<Object> cache = Utils::OpenPersistent(handle);
   JSValue* wrapper = JSValue::cast(*cache);
   Foreign* foreign = Script::cast(wrapper->value())->wrapper();
   ASSERT(foreign->foreign_address() ==
@@ -599,9 +599,6 @@
 
 Handle<Object> GetScriptNameOrSourceURL(Handle<Script> script) {
   Isolate* isolate = script->GetIsolate();
-  if (!isolate->IsInitialized()) {
-    return isolate->factory()->undefined_value();
-  }
   Handle<String> name_or_source_url_key =
       isolate->factory()->InternalizeOneByteString(
           STATIC_ASCII_VECTOR("nameOrSourceURL"));
diff --git a/src/heap.cc b/src/heap.cc
index 1df9fa1..5710b63 100644
--- a/src/heap.cc
+++ b/src/heap.cc
@@ -407,6 +407,8 @@
            this->SizeOfObjects() / KB,
            this->Available() / KB,
            this->CommittedMemory() / KB);
+  PrintPID("External memory reported: %6" V8_PTR_PREFIX "d KB\n",
+           amount_of_external_allocated_memory_ / KB);
   PrintPID("Total time spent in GC  : %.1f ms\n", total_gc_time_ms_);
 }
 
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 3d0d550..e86d216 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -8919,9 +8919,11 @@
   } else {
     // The constructor function is both an operand to the instruction and an
     // argument to the construct call.
+    Handle<JSFunction> array_function =
+        Handle<JSFunction>(isolate()->global_context()->array_function(),
+                           isolate());
     bool use_call_new_array = FLAG_optimize_constructed_arrays &&
-        !(expr->target().is_null()) &&
-        *(expr->target()) == isolate()->global_context()->array_function();
+        expr->target().is_identical_to(array_function);
 
     CHECK_ALIVE(VisitArgument(expr->expression()));
     HValue* constructor = HPushArgument::cast(Top())->argument();
@@ -8929,6 +8931,7 @@
     HCallNew* call;
     if (use_call_new_array) {
       Handle<Cell> cell = expr->allocation_info_cell();
+      AddInstruction(new(zone()) HCheckFunction(constructor, array_function));
       call = new(zone()) HCallNewArray(context, constructor, argument_count,
                                        cell);
     } else {
diff --git a/src/ia32/full-codegen-ia32.cc b/src/ia32/full-codegen-ia32.cc
index 8b01a8b..c4c1e87 100644
--- a/src/ia32/full-codegen-ia32.cc
+++ b/src/ia32/full-codegen-ia32.cc
@@ -1994,20 +1994,20 @@
       __ mov(eax, isolate()->factory()->undefined_value());
       __ jmp(&l_next);
 
-      // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
+      // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; }
       __ bind(&l_catch);
       handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
-      __ mov(edx, Operand(esp, 1 * kPointerSize));       // iter
-      __ push(edx);                                      // iter
-      __ push(eax);                                      // exception
       __ mov(ecx, isolate()->factory()->throw_string());  // "throw"
-      Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(throw_ic);                                  // iter.throw in eax
+      __ push(ecx);                                      // "throw"
+      __ push(Operand(esp, 2 * kPointerSize));           // iter
+      __ push(eax);                                      // exception
       __ jmp(&l_call);
 
-      // try { received = yield result.value }
+      // try { received = %yield result }
+      // Shuffle the received result above a try handler and yield it without
+      // re-boxing.
       __ bind(&l_try);
-      EmitCreateIteratorResult(false);                    // pop and box to eax
+      __ pop(eax);                                       // result
       __ PushTryHandler(StackHandler::CATCH, expr->index());
       const int handler_size = StackHandlerConstants::kSize;
       __ push(eax);                                      // result
@@ -2024,40 +2024,22 @@
 
       // receiver = iter; f = iter.next; arg = received;
       __ bind(&l_next);
-      __ mov(edx, Operand(esp, 1 * kPointerSize));       // iter
-      __ push(edx);                                      // iter
-      __ push(eax);                                      // received
       __ mov(ecx, isolate()->factory()->next_string());  // "next"
-      Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(next_ic);                                   // iter.next in eax
+      __ push(ecx);
+      __ push(Operand(esp, 2 * kPointerSize));           // iter
+      __ push(eax);                                      // received
 
-      // result = f.call(receiver, arg);
+      // result = receiver[f](arg);
       __ bind(&l_call);
-      Label l_call_runtime;
-      __ JumpIfSmi(eax, &l_call_runtime);
-      __ CmpObjectType(eax, JS_FUNCTION_TYPE, ebx);
-      __ j(not_equal, &l_call_runtime);
-      __ mov(edi, eax);
-      ParameterCount count(1);
-      __ InvokeFunction(edi, count, CALL_FUNCTION,
-                        NullCallWrapper(), CALL_AS_METHOD);
+      Handle<Code> ic = isolate()->stub_cache()->ComputeKeyedCallInitialize(1);
+      CallIC(ic);
       __ mov(esi, Operand(ebp, StandardFrameConstants::kContextOffset));
-      __ jmp(&l_loop);
-      __ bind(&l_call_runtime);
-      __ push(eax);
-      __ CallRuntime(Runtime::kCall, 3);
+      __ Drop(1);  // The key is still on the stack; drop it.
 
-      // val = result.value; if (!result.done) goto l_try;
+      // if (!result.done) goto l_try;
       __ bind(&l_loop);
-      // result.value
       __ push(eax);                                      // save result
       __ mov(edx, eax);                                  // result
-      __ mov(ecx, isolate()->factory()->value_string());  // "value"
-      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(value_ic);                                  // result.value in eax
-      __ pop(ebx);                                       // result
-      __ push(eax);                                      // result.value
-      __ mov(edx, ebx);                                  // result
       __ mov(ecx, isolate()->factory()->done_string());  // "done"
       Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(done_ic);                                   // result.done in eax
@@ -2067,7 +2049,10 @@
       __ j(zero, &l_try);
 
       // result.value
-      __ pop(eax);                                       // result.value
+      __ pop(edx);                                       // result
+      __ mov(ecx, isolate()->factory()->value_string());  // "value"
+      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
+      CallIC(value_ic);                                  // result.value in eax
       context()->DropAndPlug(2, eax);                    // drop iter and g
       break;
     }
diff --git a/src/log.cc b/src/log.cc
index c653c14..908a368 100644
--- a/src/log.cc
+++ b/src/log.cc
@@ -435,7 +435,7 @@
   event.code_len = code->instruction_size();
   Handle<Script> script_handle =
       script != NULL ? Handle<Script>(script) : Handle<Script>();
-  event.script = v8::Handle<v8::Script>(ToApi<v8::Script>(script_handle));
+  event.script = ToApiHandle<v8::Script>(script_handle);
   event.name.str = name;
   event.name.len = name_len;
 
@@ -1728,18 +1728,10 @@
   Handle<String> func_name(shared->DebugName());
   if (shared->script()->IsScript()) {
     Handle<Script> script(Script::cast(shared->script()));
-    Handle<String> script_name;
     if (script->name()->IsString()) {
-      script_name = Handle<String>(String::cast(script->name()));
-    } else {
-      Handle<Object> name = GetScriptNameOrSourceURL(script);
-      if (!name.is_null() && name->IsString()) {
-        script_name = Handle<String>::cast(name);
-      }
-    }
-    if (!script_name.is_null()) {
+      Handle<String> script_name(String::cast(script->name()));
       int line_num = GetScriptLineNumber(script, shared->start_position());
-      if (line_num > -1) {
+      if (line_num > 0) {
         PROFILE(isolate_,
                 CodeCreateEvent(
                     Logger::ToNativeByScript(Logger::LAZY_COMPILE_TAG, *script),
diff --git a/src/mips/assembler-mips-inl.h b/src/mips/assembler-mips-inl.h
index d922bfa..f518f05 100644
--- a/src/mips/assembler-mips-inl.h
+++ b/src/mips/assembler-mips-inl.h
@@ -232,24 +232,22 @@
 }
 
 
-Handle<JSGlobalPropertyCell> RelocInfo::target_cell_handle() {
-  ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
+Handle<Cell> RelocInfo::target_cell_handle() {
+  ASSERT(rmode_ == RelocInfo::CELL);
   Address address = Memory::Address_at(pc_);
-  return Handle<JSGlobalPropertyCell>(
-      reinterpret_cast<JSGlobalPropertyCell**>(address));
+  return Handle<Cell>(reinterpret_cast<Cell**>(address));
 }
 
 
-JSGlobalPropertyCell* RelocInfo::target_cell() {
-  ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
-  return JSGlobalPropertyCell::FromValueAddress(Memory::Address_at(pc_));
+Cell* RelocInfo::target_cell() {
+  ASSERT(rmode_ == RelocInfo::CELL);
+  return Cell::FromValueAddress(Memory::Address_at(pc_));
 }
 
 
-void RelocInfo::set_target_cell(JSGlobalPropertyCell* cell,
-                                WriteBarrierMode mode) {
-  ASSERT(rmode_ == RelocInfo::GLOBAL_PROPERTY_CELL);
-  Address address = cell->address() + JSGlobalPropertyCell::kValueOffset;
+void RelocInfo::set_target_cell(Cell* cell, WriteBarrierMode mode) {
+  ASSERT(rmode_ == RelocInfo::CELL);
+  Address address = cell->address() + Cell::kValueOffset;
   Memory::Address_at(pc_) = address;
   if (mode == UPDATE_WRITE_BARRIER && host() != NULL) {
     // TODO(1550) We are passing NULL as a slot because cell can never be on
@@ -345,8 +343,8 @@
     visitor->VisitEmbeddedPointer(this);
   } else if (RelocInfo::IsCodeTarget(mode)) {
     visitor->VisitCodeTarget(this);
-  } else if (mode == RelocInfo::GLOBAL_PROPERTY_CELL) {
-    visitor->VisitGlobalPropertyCell(this);
+  } else if (mode == RelocInfo::CELL) {
+    visitor->VisitCell(this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     visitor->VisitExternalReference(this);
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
@@ -373,8 +371,8 @@
     StaticVisitor::VisitEmbeddedPointer(heap, this);
   } else if (RelocInfo::IsCodeTarget(mode)) {
     StaticVisitor::VisitCodeTarget(heap, this);
-  } else if (mode == RelocInfo::GLOBAL_PROPERTY_CELL) {
-    StaticVisitor::VisitGlobalPropertyCell(heap, this);
+  } else if (mode == RelocInfo::CELL) {
+    StaticVisitor::VisitCell(heap, this);
   } else if (mode == RelocInfo::EXTERNAL_REFERENCE) {
     StaticVisitor::VisitExternalReference(this);
   } else if (RelocInfo::IsCodeAgeSequence(mode)) {
diff --git a/src/mips/code-stubs-mips.cc b/src/mips/code-stubs-mips.cc
index 3d0577e..5c8d08c 100644
--- a/src/mips/code-stubs-mips.cc
+++ b/src/mips/code-stubs-mips.cc
@@ -3860,7 +3860,7 @@
     __ Subu(inline_site, ra, scratch);
     // Get the map location in scratch and patch it.
     __ GetRelocatedValue(inline_site, scratch, v1);  // v1 used as scratch.
-    __ sw(map, FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
+    __ sw(map, FieldMemOperand(scratch, Cell::kValueOffset));
   }
 
   // Register mapping: a3 is object map and t0 is function prototype.
@@ -5043,7 +5043,7 @@
             masm->isolate()->heap()->the_hole_value());
 
   // Load the cache state into a3.
-  __ lw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ lw(a3, FieldMemOperand(a2, Cell::kValueOffset));
 
   // A monomorphic cache hit or an already megamorphic state: invoke the
   // function without changing the state.
@@ -5059,13 +5059,13 @@
   // An uninitialized cache is patched with the function.
   // Store a1 in the delay slot. This may or may not get overwritten depending
   // on the result of the comparison.
-  __ sw(a1, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a1, FieldMemOperand(a2, Cell::kValueOffset));
   // No need for a write barrier here - cells are rescanned.
 
   // MegamorphicSentinel is an immortal immovable object (undefined) so no
   // write-barrier is needed.
   __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-  __ sw(at, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(at, FieldMemOperand(a2, Cell::kValueOffset));
 
   __ bind(&done);
 }
@@ -5086,7 +5086,7 @@
             masm->isolate()->heap()->the_hole_value());
 
   // Load the cache state into a3.
-  __ lw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ lw(a3, FieldMemOperand(a2, Cell::kValueOffset));
 
   // A monomorphic cache hit or an already megamorphic state: invoke the
   // function without changing the state.
@@ -5117,7 +5117,7 @@
   // write-barrier is needed.
   __ bind(&megamorphic);
   __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-  __ sw(at, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(at, FieldMemOperand(a2, Cell::kValueOffset));
   __ jmp(&done);
 
   // An uninitialized cache is patched with the function or sentinel to
@@ -5134,11 +5134,11 @@
       TypeFeedbackCells::MonomorphicArraySentinel(masm->isolate(),
           GetInitialFastElementsKind());
   __ li(a3, Operand(initial_kind_sentinel));
-  __ sw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a3, FieldMemOperand(a2, Cell::kValueOffset));
   __ Branch(&done);
 
   __ bind(&not_array_function);
-  __ sw(a1, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a1, FieldMemOperand(a2, Cell::kValueOffset));
   // No need for a write barrier here - cells are rescanned.
 
   __ bind(&done);
@@ -5214,7 +5214,7 @@
     ASSERT_EQ(*TypeFeedbackCells::MegamorphicSentinel(masm->isolate()),
               masm->isolate()->heap()->undefined_value());
     __ LoadRoot(at, Heap::kUndefinedValueRootIndex);
-    __ sw(at, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+    __ sw(at, FieldMemOperand(a2, Cell::kValueOffset));
   }
   // Check for function proxy.
   __ Branch(&non_function, ne, a3, Operand(JS_FUNCTION_PROXY_TYPE));
@@ -7776,14 +7776,13 @@
     __ Assert(eq, "Unexpected initial map for Array function",
         t0, Operand(MAP_TYPE));
 
-    // We should either have undefined in ebx or a valid jsglobalpropertycell
+    // We should either have undefined in a2 or a valid cell
     Label okay_here;
-    Handle<Map> global_property_cell_map(
-        masm->isolate()->heap()->global_property_cell_map());
+    Handle<Map> cell_map = masm->isolate()->factory()->cell_map();
     __ Branch(&okay_here, eq, a2, Operand(undefined_sentinel));
     __ lw(a3, FieldMemOperand(a2, 0));
-    __ Assert(eq, "Expected property cell in register ebx",
-        a3, Operand(global_property_cell_map));
+    __ Assert(eq, "Expected property cell in register a2",
+        a3, Operand(cell_map));
     __ bind(&okay_here);
   }
 
diff --git a/src/mips/full-codegen-mips.cc b/src/mips/full-codegen-mips.cc
index 2a51b1c..a16e478 100644
--- a/src/mips/full-codegen-mips.cc
+++ b/src/mips/full-codegen-mips.cc
@@ -138,7 +138,7 @@
   CompilationInfo* info = info_;
   handler_table_ =
       isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED);
-  profiling_counter_ = isolate()->factory()->NewJSGlobalPropertyCell(
+  profiling_counter_ = isolate()->factory()->NewCell(
       Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate()));
   SetFunctionPosition(function());
   Comment cmnt(masm_, "[ function compiled by full code generator");
@@ -326,9 +326,9 @@
 
 void FullCodeGenerator::EmitProfilingCounterDecrement(int delta) {
   __ li(a2, Operand(profiling_counter_));
-  __ lw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ lw(a3, FieldMemOperand(a2, Cell::kValueOffset));
   __ Subu(a3, a3, Operand(Smi::FromInt(delta)));
-  __ sw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a3, FieldMemOperand(a2, Cell::kValueOffset));
 }
 
 
@@ -344,7 +344,7 @@
   }
   __ li(a2, Operand(profiling_counter_));
   __ li(a3, Operand(Smi::FromInt(reset_value)));
-  __ sw(a3, FieldMemOperand(a2, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a3, FieldMemOperand(a2, Cell::kValueOffset));
 }
 
 
@@ -1164,15 +1164,13 @@
   Label non_proxy;
   __ bind(&fixed_array);
 
-  Handle<JSGlobalPropertyCell> cell =
-      isolate()->factory()->NewJSGlobalPropertyCell(
-          Handle<Object>(
-              Smi::FromInt(TypeFeedbackCells::kForInFastCaseMarker),
-              isolate()));
+  Handle<Cell> cell = isolate()->factory()->NewCell(
+      Handle<Object>(Smi::FromInt(TypeFeedbackCells::kForInFastCaseMarker),
+                     isolate()));
   RecordTypeFeedbackCell(stmt->ForInFeedbackId(), cell);
   __ LoadHeapObject(a1, cell);
   __ li(a2, Operand(Smi::FromInt(TypeFeedbackCells::kForInSlowCaseMarker)));
-  __ sw(a2, FieldMemOperand(a1, JSGlobalPropertyCell::kValueOffset));
+  __ sw(a2, FieldMemOperand(a1, Cell::kValueOffset));
 
   __ li(a1, Operand(Smi::FromInt(1)));  // Smi indicates slow check
   __ lw(a2, MemOperand(sp, 0 * kPointerSize));  // Get enumerated object
@@ -2702,8 +2700,7 @@
   flags = static_cast<CallFunctionFlags>(flags | RECORD_CALL_TARGET);
   Handle<Object> uninitialized =
       TypeFeedbackCells::UninitializedSentinel(isolate());
-  Handle<JSGlobalPropertyCell> cell =
-      isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
+  Handle<Cell> cell = isolate()->factory()->NewCell(uninitialized);
   RecordTypeFeedbackCell(expr->CallFeedbackId(), cell);
   __ li(a2, Operand(cell));
 
@@ -2897,8 +2894,7 @@
   // Record call targets in unoptimized code.
   Handle<Object> uninitialized =
      TypeFeedbackCells::UninitializedSentinel(isolate());
-  Handle<JSGlobalPropertyCell> cell =
-      isolate()->factory()->NewJSGlobalPropertyCell(uninitialized);
+  Handle<Cell> cell = isolate()->factory()->NewCell(uninitialized);
   RecordTypeFeedbackCell(expr->CallNewFeedbackId(), cell);
   __ li(a2, Operand(cell));
 
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index f8d743e..0f02578 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -2439,8 +2439,7 @@
   // We use Factory::the_hole_value() on purpose instead of loading from the
   // root array to force relocation to be able to later patch with
   // the cached map.
-  Handle<JSGlobalPropertyCell> cell =
-      factory()->NewJSGlobalPropertyCell(factory()->the_hole_value());
+  Handle<Cell> cell = factory()->NewCell(factory()->the_hole_value());
   __ li(at, Operand(Handle<Object>(cell)));
   __ lw(at, FieldMemOperand(at, JSGlobalPropertyCell::kValueOffset));
   __ Branch(&cache_miss, ne, map, Operand(at));
@@ -2596,7 +2595,7 @@
 void LCodeGen::DoLoadGlobalCell(LLoadGlobalCell* instr) {
   Register result = ToRegister(instr->result());
   __ li(at, Operand(Handle<Object>(instr->hydrogen()->cell())));
-  __ lw(result, FieldMemOperand(at, JSGlobalPropertyCell::kValueOffset));
+  __ lw(result, FieldMemOperand(at, Cell::kValueOffset));
   if (instr->hydrogen()->RequiresHoleCheck()) {
     __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(eq, instr->environment(), result, Operand(at));
@@ -2630,13 +2629,13 @@
   if (instr->hydrogen()->RequiresHoleCheck()) {
     // We use a temp to check the payload.
     Register payload = ToRegister(instr->temp());
-    __ lw(payload, FieldMemOperand(cell, JSGlobalPropertyCell::kValueOffset));
+    __ lw(payload, FieldMemOperand(cell, Cell::kValueOffset));
     __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(eq, instr->environment(), payload, Operand(at));
   }
 
   // Store the value.
-  __ sw(value, FieldMemOperand(cell, JSGlobalPropertyCell::kValueOffset));
+  __ sw(value, FieldMemOperand(cell, Cell::kValueOffset));
   // Cells are always rescanned, so no write barrier here.
 }
 
@@ -3904,8 +3903,25 @@
     ArrayNoArgumentConstructorStub stub(kind, disable_allocation_sites);
     CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
   } else if (instr->arity() == 1) {
+    Label done;
+    if (IsFastPackedElementsKind(kind)) {
+      Label packed_case;
+      // We might need a change here,
+      // look at the first argument.
+      __ lw(t1, MemOperand(sp, 0));
+      __ Branch(&packed_case, eq, t1, Operand(zero_reg));
+
+      ElementsKind holey_kind = GetHoleyElementsKind(kind);
+      ArraySingleArgumentConstructorStub stub(holey_kind,
+                                              disable_allocation_sites);
+      CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
+      __ jmp(&done);
+      __ bind(&packed_case);
+    }
+
     ArraySingleArgumentConstructorStub stub(kind, disable_allocation_sites);
     CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
+    __ bind(&done);
   } else {
     ArrayNArgumentsConstructorStub stub(kind, disable_allocation_sites);
     CallCode(stub.GetCode(isolate()), RelocInfo::CONSTRUCT_CALL, instr);
@@ -5001,10 +5017,9 @@
   AllowDeferredHandleDereference smi_check;
   if (isolate()->heap()->InNewSpace(*target)) {
     Register reg = ToRegister(instr->value());
-    Handle<JSGlobalPropertyCell> cell =
-        isolate()->factory()->NewJSGlobalPropertyCell(target);
+    Handle<Cell> cell = isolate()->factory()->NewJSGlobalPropertyCell(target);
     __ li(at, Operand(Handle<Object>(cell)));
-    __ lw(at, FieldMemOperand(at, JSGlobalPropertyCell::kValueOffset));
+    __ lw(at, FieldMemOperand(at, Cell::kValueOffset));
     DeoptimizeIf(ne, instr->environment(), reg,
                  Operand(at));
   } else {
diff --git a/src/mips/macro-assembler-mips.cc b/src/mips/macro-assembler-mips.cc
index d55451b..15436e7 100644
--- a/src/mips/macro-assembler-mips.cc
+++ b/src/mips/macro-assembler-mips.cc
@@ -85,10 +85,9 @@
                                     Handle<HeapObject> object) {
   AllowDeferredHandleDereference using_raw_address;
   if (isolate()->heap()->InNewSpace(*object)) {
-    Handle<JSGlobalPropertyCell> cell =
-        isolate()->factory()->NewJSGlobalPropertyCell(object);
+    Handle<Cell> cell = isolate()->factory()->NewCell(object);
     li(result, Operand(cell));
-    lw(result, FieldMemOperand(result, JSGlobalPropertyCell::kValueOffset));
+    lw(result, FieldMemOperand(result, Cell::kValueOffset));
   } else {
     li(result, Operand(object));
   }
diff --git a/src/mips/stub-cache-mips.cc b/src/mips/stub-cache-mips.cc
index be32744..6e42242 100644
--- a/src/mips/stub-cache-mips.cc
+++ b/src/mips/stub-cache-mips.cc
@@ -420,12 +420,10 @@
                                       Handle<Name> name,
                                       Register scratch,
                                       Label* miss) {
-  Handle<JSGlobalPropertyCell> cell =
-      GlobalObject::EnsurePropertyCell(global, name);
+  Handle<Cell> cell = GlobalObject::EnsurePropertyCell(global, name);
   ASSERT(cell->value()->IsTheHole());
   __ li(scratch, Operand(cell));
-  __ lw(scratch,
-        FieldMemOperand(scratch, JSGlobalPropertyCell::kValueOffset));
+  __ lw(scratch, FieldMemOperand(scratch, Cell::kValueOffset));
   __ LoadRoot(at, Heap::kTheHoleValueRootIndex);
   __ Branch(miss, ne, scratch, Operand(at));
 }
@@ -1600,12 +1598,12 @@
 
 
 void CallStubCompiler::GenerateLoadFunctionFromCell(
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Label* miss) {
   // Get the value from the cell.
   __ li(a3, Operand(cell));
-  __ lw(a1, FieldMemOperand(a3, JSGlobalPropertyCell::kValueOffset));
+  __ lw(a1, FieldMemOperand(a3, Cell::kValueOffset));
 
   // Check that the cell contains the same function.
   if (heap()->InNewSpace(*function)) {
@@ -1675,7 +1673,7 @@
 Handle<Code> CallStubCompiler::CompileArrayPushCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -1929,7 +1927,7 @@
 Handle<Code> CallStubCompiler::CompileArrayPopCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2011,7 +2009,7 @@
 Handle<Code> CallStubCompiler::CompileStringCharCodeAtCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2093,7 +2091,7 @@
 Handle<Code> CallStubCompiler::CompileStringCharAtCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2174,7 +2172,7 @@
 Handle<Code> CallStubCompiler::CompileStringFromCharCodeCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2247,7 +2245,7 @@
 Handle<Code> CallStubCompiler::CompileMathFloorCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2376,7 +2374,7 @@
 Handle<Code> CallStubCompiler::CompileMathAbsCall(
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
   // ----------- S t a t e -------------
@@ -2476,7 +2474,7 @@
     const CallOptimization& optimization,
     Handle<Object> object,
     Handle<JSObject> holder,
-    Handle<JSGlobalPropertyCell> cell,
+    Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name) {
 
@@ -2649,7 +2647,7 @@
     Handle<JSFunction> function) {
   if (HasCustomCallGenerator(function)) {
     Handle<Code> code = CompileCustomCall(object, holder,
-                                          Handle<JSGlobalPropertyCell>::null(),
+                                          Handle<Cell>::null(),
                                           function, Handle<String>::cast(name));
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
@@ -2899,13 +2897,11 @@
   // global object. We bail out to the runtime system to do that.
   __ li(scratch1(), Operand(cell));
   __ LoadRoot(scratch2(), Heap::kTheHoleValueRootIndex);
-  __ lw(scratch3(),
-        FieldMemOperand(scratch1(), JSGlobalPropertyCell::kValueOffset));
+  __ lw(scratch3(), FieldMemOperand(scratch1(), Cell::kValueOffset));
   __ Branch(&miss, eq, scratch3(), Operand(scratch2()));
 
   // Store the value in the cell.
-  __ sw(value(),
-        FieldMemOperand(scratch1(), JSGlobalPropertyCell::kValueOffset));
+  __ sw(value(), FieldMemOperand(scratch1(), Cell::kValueOffset));
   __ mov(v0, a0);  // Stored value must be returned in v0.
   // Cells are always rescanned, so no write barrier here.
 
@@ -3039,7 +3035,7 @@
 
   // Get the value from the cell.
   __ li(a3, Operand(cell));
-  __ lw(t0, FieldMemOperand(a3, JSGlobalPropertyCell::kValueOffset));
+  __ lw(t0, FieldMemOperand(a3, Cell::kValueOffset));
 
   // Check for deleted property if property can actually be deleted.
   if (!is_dont_delete) {
diff --git a/src/mksnapshot.cc b/src/mksnapshot.cc
index 71e9e69..3ac475b 100644
--- a/src/mksnapshot.cc
+++ b/src/mksnapshot.cc
@@ -392,7 +392,7 @@
   // If we don't do this then we end up with a stray root pointing at the
   // context even after we have disposed of the context.
   HEAP->CollectAllGarbage(i::Heap::kNoGCFlags, "mksnapshot");
-  i::Object* raw_context = *(v8::Utils::OpenHandle(*context));
+  i::Object* raw_context = *v8::Utils::OpenPersistent(context);
   context.Dispose(isolate);
   CppByteSink sink(argv[1]);
   // This results in a somewhat smaller snapshot, probably because it gets rid
diff --git a/src/profile-generator.cc b/src/profile-generator.cc
index 5418979..d15c400 100644
--- a/src/profile-generator.cc
+++ b/src/profile-generator.cc
@@ -79,7 +79,7 @@
                                            v8::Persistent<v8::Value>* handle,
                                            void* parameter) {
   reinterpret_cast<TokenEnumerator*>(parameter)->TokenRemoved(
-      Utils::OpenHandle(**handle).location());
+      Utils::OpenPersistent(handle).location());
   handle->Dispose(isolate);
 }
 
diff --git a/src/runtime.cc b/src/runtime.cc
index 8711764..01165c8 100644
--- a/src/runtime.cc
+++ b/src/runtime.cc
@@ -655,7 +655,7 @@
                                     void* data) {
   Isolate* isolate = reinterpret_cast<Isolate*>(external_isolate);
   HandleScope scope(isolate);
-  Handle<Object> internal_object = Utils::OpenHandle(**object);
+  Handle<Object> internal_object = Utils::OpenPersistent(object);
   Handle<JSArrayBuffer> array_buffer(JSArrayBuffer::cast(*internal_object));
 
   if (!array_buffer->is_external()) {
@@ -711,11 +711,10 @@
 
   SetupArrayBuffer(isolate, array_buffer, false, data, allocated_length);
 
-  v8::Isolate* external_isolate = reinterpret_cast<v8::Isolate*>(isolate);
-  v8::Persistent<v8::Value> weak_handle(
-      external_isolate, v8::Utils::ToLocal(Handle<Object>::cast(array_buffer)));
-  weak_handle.MakeWeak(external_isolate, data, ArrayBufferWeakCallback);
-  weak_handle.MarkIndependent(external_isolate);
+  Handle<Object> persistent = isolate->global_handles()->Create(*array_buffer);
+  GlobalHandles::MakeWeak(persistent.location(), data, ArrayBufferWeakCallback);
+  GlobalHandles::MarkIndependent(persistent.location());
+
   isolate->heap()->AdjustAmountOfExternalAllocatedMemory(allocated_length);
 
   return true;
diff --git a/src/v8.h b/src/v8.h
index b8a5ae4..b16374f 100644
--- a/src/v8.h
+++ b/src/v8.h
@@ -48,9 +48,6 @@
 #error both DEBUG and NDEBUG are set
 #endif
 
-// TODO(dcarney): remove this
-#define V8_ALLOW_ACCESS_TO_RAW_HANDLE_CONSTRUCTOR
-
 // Basic includes
 #include "../include/v8.h"
 #include "v8globals.h"
diff --git a/src/version.cc b/src/version.cc
index f6e8e2f..e443d37 100644
--- a/src/version.cc
+++ b/src/version.cc
@@ -34,7 +34,7 @@
 // system so their names cannot be changed without changing the scripts.
 #define MAJOR_VERSION     3
 #define MINOR_VERSION     19
-#define BUILD_NUMBER      14
+#define BUILD_NUMBER      15
 #define PATCH_LEVEL       0
 // Use 1 for candidates and 0 otherwise.
 // (Boolean macro values are not supported by all preprocessors.)
diff --git a/src/x64/full-codegen-x64.cc b/src/x64/full-codegen-x64.cc
index 74ccef9..4afcadb 100644
--- a/src/x64/full-codegen-x64.cc
+++ b/src/x64/full-codegen-x64.cc
@@ -2017,21 +2017,20 @@
       __ LoadRoot(rax, Heap::kUndefinedValueRootIndex);
       __ jmp(&l_next);
 
-      // catch (e) { receiver = iter; f = iter.throw; arg = e; goto l_call; }
+      // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; }
       __ bind(&l_catch);
       handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos()));
-      __ movq(rcx, Operand(rsp, 1 * kPointerSize));      // iter
-      __ push(rcx);                                      // iter
-      __ push(rax);                                      // exception
-      __ movq(rax, rcx);                                 // iter
       __ LoadRoot(rcx, Heap::kthrow_stringRootIndex);    // "throw"
-      Handle<Code> throw_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(throw_ic);                                  // iter.throw in rax
+      __ push(rcx);
+      __ push(Operand(rsp, 2 * kPointerSize));           // iter
+      __ push(rax);                                      // exception
       __ jmp(&l_call);
 
-      // try { received = yield result.value }
+      // try { received = %yield result }
+      // Shuffle the received result above a try handler and yield it without
+      // re-boxing.
       __ bind(&l_try);
-      EmitCreateIteratorResult(false);                    // pop and box to rax
+      __ pop(rax);                                       // result
       __ PushTryHandler(StackHandler::CATCH, expr->index());
       const int handler_size = StackHandlerConstants::kSize;
       __ push(rax);                                      // result
@@ -2046,42 +2045,23 @@
       __ bind(&l_resume);                                // received in rax
       __ PopTryHandler();
 
-      // receiver = iter; f = iter.next; arg = received;
+      // receiver = iter; f = 'next'; arg = received;
       __ bind(&l_next);
-      __ movq(rcx, Operand(rsp, 1 * kPointerSize));      // iter
-      __ push(rcx);                                      // iter
-      __ push(rax);                                      // received
-      __ movq(rax, rcx);                                 // iter
       __ LoadRoot(rcx, Heap::knext_stringRootIndex);     // "next"
-      Handle<Code> next_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(next_ic);                                   // iter.next in rax
+      __ push(rcx);
+      __ push(Operand(rsp, 2 * kPointerSize));           // iter
+      __ push(rax);                                      // received
 
-      // result = f.call(receiver, arg);
+      // result = receiver[f](arg);
       __ bind(&l_call);
-      Label l_call_runtime;
-      __ JumpIfSmi(rax, &l_call_runtime);
-      __ CmpObjectType(rax, JS_FUNCTION_TYPE, rbx);
-      __ j(not_equal, &l_call_runtime);
-      __ movq(rdi, rax);
-      ParameterCount count(1);
-      __ InvokeFunction(rdi, count, CALL_FUNCTION,
-                        NullCallWrapper(), CALL_AS_METHOD);
+      Handle<Code> ic = isolate()->stub_cache()->ComputeKeyedCallInitialize(1);
+      CallIC(ic);
       __ movq(rsi, Operand(rbp, StandardFrameConstants::kContextOffset));
-      __ jmp(&l_loop);
-      __ bind(&l_call_runtime);
-      __ push(rax);
-      __ CallRuntime(Runtime::kCall, 3);
+      __ Drop(1);  // The key is still on the stack; drop it.
 
-      // val = result.value; if (!result.done) goto l_try;
+      // if (!result.done) goto l_try;
       __ bind(&l_loop);
-      // result.value
       __ push(rax);                                      // save result
-      __ LoadRoot(rcx, Heap::kvalue_stringRootIndex);    // "value"
-      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
-      CallIC(value_ic);                                  // result.value in rax
-      __ pop(rbx);                                       // result
-      __ push(rax);                                      // result.value
-      __ movq(rax, rbx);                                 // result
       __ LoadRoot(rcx, Heap::kdone_stringRootIndex);     // "done"
       Handle<Code> done_ic = isolate()->builtins()->LoadIC_Initialize();
       CallIC(done_ic);                                   // result.done in rax
@@ -2091,7 +2071,10 @@
       __ j(zero, &l_try);
 
       // result.value
-      __ pop(rax);                                       // result.value
+      __ pop(rax);                                       // result
+      __ LoadRoot(rcx, Heap::kvalue_stringRootIndex);    // "value"
+      Handle<Code> value_ic = isolate()->builtins()->LoadIC_Initialize();
+      CallIC(value_ic);                                  // result.value in rax
       context()->DropAndPlug(2, rax);                    // drop iter and g
       break;
     }
diff --git a/test/cctest/cctest.h b/test/cctest/cctest.h
index c249b5e..193126a 100644
--- a/test/cctest/cctest.h
+++ b/test/cctest/cctest.h
@@ -200,7 +200,6 @@
   const char* name_;
 };
 
-namespace v8 {
 // A LocalContext holds a reference to a v8::Context.
 class LocalContext {
  public:
@@ -209,24 +208,27 @@
                    v8::Handle<v8::ObjectTemplate>(),
                v8::Handle<v8::Value> global_object = v8::Handle<v8::Value>()) {
     v8::Isolate* isolate = v8::Isolate::GetCurrent();
-    HandleScope scope(isolate);
-    context_.Reset(isolate,
-                   Context::New(isolate,
-                                extensions,
-                                global_template,
-                                global_object));
-    context_->Enter();
+    v8::HandleScope scope(isolate);
+    v8::Local<v8::Context> context = v8::Context::New(isolate,
+                                                      extensions,
+                                                      global_template,
+                                                      global_object);
+    context_.Reset(isolate, context);
+    context->Enter();
     // We can't do this later perhaps because of a fatal error.
-    isolate_ = context_->GetIsolate();
+    isolate_ = context->GetIsolate();
   }
 
   virtual ~LocalContext() {
-    context_->Exit();
-    context_.Dispose(isolate_);
+    v8::HandleScope scope(isolate_);
+    v8::Local<v8::Context>::New(isolate_, context_)->Exit();
+    context_.Dispose();
   }
 
-  v8::Context* operator->() { return *context_; }
-  v8::Context* operator*() { return *context_; }
+  v8::Context* operator->() {
+    return *reinterpret_cast<v8::Context**>(&context_);
+  }
+  v8::Context* operator*() { return operator->(); }
   bool IsReady() { return !context_.IsEmpty(); }
 
   v8::Local<v8::Context> local() {
@@ -237,8 +239,6 @@
   v8::Persistent<v8::Context> context_;
   v8::Isolate* isolate_;
 };
-}
-typedef v8::LocalContext LocalContext;
 
 static inline v8::Local<v8::Value> v8_num(double x) {
   return v8::Number::New(x);
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index 5d3a79d..5d38c21 100755
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -2630,12 +2630,12 @@
   v8::HandleScope handle_scope(isolate);
 
 
-  v8::Handle<v8::Value> result =
+  v8::Local<v8::Value> result =
       CompileRun("var ab1 = new ArrayBuffer(2);"
                  "var u8_a = new Uint8Array(ab1);"
                  "u8_a[0] = 0xAA;"
                  "u8_a[1] = 0xFF; u8_a.buffer");
-  Local<v8::ArrayBuffer> ab1 = v8::ArrayBuffer::Cast(*result);
+  Local<v8::ArrayBuffer> ab1 = Local<v8::ArrayBuffer>::Cast(result);
   CHECK_EQ(2, static_cast<int>(ab1->ByteLength()));
   CHECK(!ab1->IsExternal());
   ScopedArrayBufferContents ab1_contents(ab1->Externalize());
@@ -2776,25 +2776,28 @@
       "var f32a = new Float32Array(ab, 4, 255);"
       "var f64a = new Float64Array(ab, 8, 127);");
 
-  v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+  v8::Handle<v8::ArrayBuffer> ab =
+      Local<v8::ArrayBuffer>::Cast(CompileRun("ab"));
 
-  v8::Handle<v8::Uint8Array> u8a(v8::Uint8Array::Cast(*CompileRun("u8a")));
-  v8::Handle<v8::Uint8ClampedArray> u8c(
-    v8::Uint8ClampedArray::Cast(*CompileRun("u8c")));
-  v8::Handle<v8::Int8Array> i8a(v8::Int8Array::Cast(*CompileRun("i8a")));
+  v8::Handle<v8::Uint8Array> u8a =
+      v8::Handle<v8::Uint8Array>::Cast(CompileRun("u8a"));
+  v8::Handle<v8::Uint8ClampedArray> u8c =
+      v8::Handle<v8::Uint8ClampedArray>::Cast(CompileRun("u8c"));
+  v8::Handle<v8::Int8Array> i8a =
+      v8::Handle<v8::Int8Array>::Cast(CompileRun("i8a"));
 
-  v8::Handle<v8::Uint16Array> u16a(
-    v8::Uint16Array::Cast(*CompileRun("u16a")));
-  v8::Handle<v8::Int16Array> i16a(
-    v8::Int16Array::Cast(*CompileRun("i16a")));
-  v8::Handle<v8::Uint32Array> u32a(
-    v8::Uint32Array::Cast(*CompileRun("u32a")));
-  v8::Handle<v8::Int32Array> i32a(
-    v8::Int32Array::Cast(*CompileRun("i32a")));
-  v8::Handle<v8::Float32Array> f32a(
-    v8::Float32Array::Cast(*CompileRun("f32a")));
-  v8::Handle<v8::Float64Array> f64a(
-    v8::Float64Array::Cast(*CompileRun("f64a")));
+  v8::Handle<v8::Uint16Array> u16a =
+      v8::Handle<v8::Uint16Array>::Cast(CompileRun("u16a"));
+  v8::Handle<v8::Int16Array> i16a =
+      v8::Handle<v8::Int16Array>::Cast(CompileRun("i16a"));
+  v8::Handle<v8::Uint32Array> u32a =
+      v8::Handle<v8::Uint32Array>::Cast(CompileRun("u32a"));
+  v8::Handle<v8::Int32Array> i32a =
+      v8::Handle<v8::Int32Array>::Cast(CompileRun("i32a"));
+  v8::Handle<v8::Float32Array> f32a =
+      v8::Handle<v8::Float32Array>::Cast(CompileRun("f32a"));
+  v8::Handle<v8::Float64Array> f64a =
+    v8::Handle<v8::Float64Array>::Cast(CompileRun("f64a"));
 
   ScopedArrayBufferContents contents(ab->Externalize());
   ab->Neuter();
@@ -3102,6 +3105,11 @@
 }
 
 
+static UniqueId MakeUniqueId(const Persistent<Value>& p) {
+  return UniqueId(reinterpret_cast<uintptr_t>(*v8::Utils::OpenPersistent(p)));
+}
+
+
 THREADED_TEST(ApiObjectGroups) {
   LocalContext env;
   v8::Isolate* iso = env->GetIsolate();
@@ -3121,16 +3129,16 @@
     g1s1.Reset(iso, Object::New());
     g1s2.Reset(iso, Object::New());
     g1c1.Reset(iso, Object::New());
-    g1s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g1s2.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g1c1.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g1s1.MakeWeak(&counter, &WeakPointerCallback);
+    g1s2.MakeWeak(&counter, &WeakPointerCallback);
+    g1c1.MakeWeak(&counter, &WeakPointerCallback);
 
     g2s1.Reset(iso, Object::New());
     g2s2.Reset(iso, Object::New());
     g2c1.Reset(iso, Object::New());
-    g2s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g2s2.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g2c1.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g2s1.MakeWeak(&counter, &WeakPointerCallback);
+    g2s2.MakeWeak(&counter, &WeakPointerCallback);
+    g2c1.MakeWeak(&counter, &WeakPointerCallback);
   }
 
   Persistent<Value> root(iso, g1s1);  // make a root.
@@ -3139,14 +3147,14 @@
   {
     HandleScope scope(iso);
     CHECK(Local<Object>::New(iso, g1s2.As<Object>())->
-            Set(0, Local<Value>(*g2s2)));
+            Set(0, Local<Value>::New(iso, g2s2)));
     CHECK(Local<Object>::New(iso, g2s1.As<Object>())->
-            Set(0, Local<Value>(*g1s1)));
+            Set(0, Local<Value>::New(iso, g1s1)));
   }
 
   {
-    UniqueId id1(reinterpret_cast<intptr_t>(*g1s1));
-    UniqueId id2(reinterpret_cast<intptr_t>(*g2s2));
+    UniqueId id1 = MakeUniqueId(g1s1);
+    UniqueId id2 = MakeUniqueId(g2s2);
     iso->SetObjectGroupId(g1s1, id1);
     iso->SetObjectGroupId(g1s2, id1);
     iso->SetReferenceFromGroup(id1, g1c1);
@@ -3163,7 +3171,7 @@
   CHECK_EQ(0, counter.NumberOfWeakCalls());
 
   // Weaken the root.
-  root.MakeWeak(iso, &counter, &WeakPointerCallback);
+  root.MakeWeak(&counter, &WeakPointerCallback);
   // But make children strong roots---all the objects (except for children)
   // should be collectable now.
   g1c1.ClearWeak(iso);
@@ -3171,8 +3179,8 @@
 
   // Groups are deleted, rebuild groups.
   {
-    UniqueId id1(reinterpret_cast<intptr_t>(*g1s1));
-    UniqueId id2(reinterpret_cast<intptr_t>(*g2s2));
+    UniqueId id1 = MakeUniqueId(g1s1);
+    UniqueId id2 = MakeUniqueId(g2s2);
     iso->SetObjectGroupId(g1s1, id1);
     iso->SetObjectGroupId(g1s2, id1);
     iso->SetReferenceFromGroup(id1, g1c1);
@@ -3187,8 +3195,8 @@
   CHECK_EQ(5, counter.NumberOfWeakCalls());
 
   // And now make children weak again and collect them.
-  g1c1.MakeWeak(iso, &counter, &WeakPointerCallback);
-  g2c1.MakeWeak(iso, &counter, &WeakPointerCallback);
+  g1c1.MakeWeak(&counter, &WeakPointerCallback);
+  g2c1.MakeWeak(&counter, &WeakPointerCallback);
 
   heap->CollectAllGarbage(i::Heap::kAbortIncrementalMarkingMask);
   CHECK_EQ(7, counter.NumberOfWeakCalls());
@@ -3215,29 +3223,29 @@
     HandleScope scope(iso);
     g1s1.Reset(iso, Object::New());
     g1s2.Reset(iso, Object::New());
-    g1s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g1s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g1s1.MakeWeak(&counter, &WeakPointerCallback);
+    g1s2.MakeWeak(&counter, &WeakPointerCallback);
     CHECK(g1s1.IsWeak(iso));
     CHECK(g1s2.IsWeak(iso));
 
     g2s1.Reset(iso, Object::New());
     g2s2.Reset(iso, Object::New());
-    g2s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g2s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g2s1.MakeWeak(&counter, &WeakPointerCallback);
+    g2s2.MakeWeak(&counter, &WeakPointerCallback);
     CHECK(g2s1.IsWeak(iso));
     CHECK(g2s2.IsWeak(iso));
 
     g3s1.Reset(iso, Object::New());
     g3s2.Reset(iso, Object::New());
-    g3s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g3s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g3s1.MakeWeak(&counter, &WeakPointerCallback);
+    g3s2.MakeWeak(&counter, &WeakPointerCallback);
     CHECK(g3s1.IsWeak(iso));
     CHECK(g3s2.IsWeak(iso));
 
     g4s1.Reset(iso, Object::New());
     g4s2.Reset(iso, Object::New());
-    g4s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g4s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g4s1.MakeWeak(&counter, &WeakPointerCallback);
+    g4s2.MakeWeak(&counter, &WeakPointerCallback);
     CHECK(g4s1.IsWeak(iso));
     CHECK(g4s2.IsWeak(iso));
   }
@@ -3248,10 +3256,10 @@
   // G1: { g1s1, g2s1 }, g1s1 implicitly references g2s1, ditto for other
   // groups.
   {
-    UniqueId id1(reinterpret_cast<intptr_t>(*g1s1));
-    UniqueId id2(reinterpret_cast<intptr_t>(*g2s1));
-    UniqueId id3(reinterpret_cast<intptr_t>(*g3s1));
-    UniqueId id4(reinterpret_cast<intptr_t>(*g4s1));
+    UniqueId id1 = MakeUniqueId(g1s1);
+    UniqueId id2 = MakeUniqueId(g2s1);
+    UniqueId id3 = MakeUniqueId(g3s1);
+    UniqueId id4 = MakeUniqueId(g4s1);
     iso->SetObjectGroupId(g1s1, id1);
     iso->SetObjectGroupId(g1s2, id1);
     iso->SetReferenceFromGroup(id1, g2s1);
@@ -3274,14 +3282,14 @@
   CHECK_EQ(0, counter.NumberOfWeakCalls());
 
   // Weaken the root.
-  root.MakeWeak(iso, &counter, &WeakPointerCallback);
+  root.MakeWeak(&counter, &WeakPointerCallback);
 
   // Groups are deleted, rebuild groups.
   {
-    UniqueId id1(reinterpret_cast<intptr_t>(*g1s1));
-    UniqueId id2(reinterpret_cast<intptr_t>(*g2s1));
-    UniqueId id3(reinterpret_cast<intptr_t>(*g3s1));
-    UniqueId id4(reinterpret_cast<intptr_t>(*g4s1));
+    UniqueId id1 = MakeUniqueId(g1s1);
+    UniqueId id2 = MakeUniqueId(g2s1);
+    UniqueId id3 = MakeUniqueId(g3s1);
+    UniqueId id4 = MakeUniqueId(g4s1);
     iso->SetObjectGroupId(g1s1, id1);
     iso->SetObjectGroupId(g1s2, id1);
     iso->SetReferenceFromGroup(id1, g2s1);
@@ -3325,18 +3333,18 @@
     HandleScope scope(iso);
     g1s1.Reset(iso, Object::New());
     g1s2.Reset(iso, Object::New());
-    g1s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g1s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g1s1.MakeWeak(&counter, &WeakPointerCallback);
+    g1s2.MakeWeak(&counter, &WeakPointerCallback);
 
     g2s1.Reset(iso, Object::New());
     g2s2.Reset(iso, Object::New());
-    g2s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g2s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g2s1.MakeWeak(&counter, &WeakPointerCallback);
+    g2s2.MakeWeak(&counter, &WeakPointerCallback);
 
     g3s1.Reset(iso, Object::New());
     g3s2.Reset(iso, Object::New());
-    g3s1.MakeWeak(iso, &counter, &WeakPointerCallback);
-    g3s2.MakeWeak(iso, &counter, &WeakPointerCallback);
+    g3s1.MakeWeak(&counter, &WeakPointerCallback);
+    g3s2.MakeWeak(&counter, &WeakPointerCallback);
   }
 
   // Make a root.
@@ -3356,16 +3364,16 @@
     g3s2.MarkPartiallyDependent(iso);
     iso->SetObjectGroupId(g1s1, UniqueId(1));
     iso->SetObjectGroupId(g1s2, UniqueId(1));
-    Local<Object>::New(iso, g1s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g2s1));
+    Local<Object>::New(iso, g1s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g2s1));
     iso->SetObjectGroupId(g2s1, UniqueId(2));
     iso->SetObjectGroupId(g2s2, UniqueId(2));
-    Local<Object>::New(iso, g2s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g3s1));
+    Local<Object>::New(iso, g2s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g3s1));
     iso->SetObjectGroupId(g3s1, UniqueId(3));
     iso->SetObjectGroupId(g3s2, UniqueId(3));
-    Local<Object>::New(iso, g3s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g1s1));
+    Local<Object>::New(iso, g3s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g1s1));
   }
 
   v8::internal::Heap* heap = reinterpret_cast<v8::internal::Isolate*>(
@@ -3376,7 +3384,7 @@
   CHECK_EQ(0, counter.NumberOfWeakCalls());
 
   // Weaken the root.
-  root.MakeWeak(iso, &counter, &WeakPointerCallback);
+  root.MakeWeak(&counter, &WeakPointerCallback);
   root.MarkPartiallyDependent(iso);
 
   v8::Isolate* isolate = v8::Isolate::GetCurrent();
@@ -3391,16 +3399,16 @@
     g3s2.MarkPartiallyDependent(isolate);
     iso->SetObjectGroupId(g1s1, UniqueId(1));
     iso->SetObjectGroupId(g1s2, UniqueId(1));
-    Local<Object>::New(iso, g1s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g2s1));
+    Local<Object>::New(iso, g1s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g2s1));
     iso->SetObjectGroupId(g2s1, UniqueId(2));
     iso->SetObjectGroupId(g2s2, UniqueId(2));
-    Local<Object>::New(iso, g2s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g3s1));
+    Local<Object>::New(iso, g2s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g3s1));
     iso->SetObjectGroupId(g3s1, UniqueId(3));
     iso->SetObjectGroupId(g3s2, UniqueId(3));
-    Local<Object>::New(iso, g3s1.As<Object>())->Set(v8_str("x"),
-                                                    Local<Value>(*g1s1));
+    Local<Object>::New(iso, g3s1.As<Object>())->Set(
+        v8_str("x"), Local<Value>::New(iso, g1s1));
   }
 
   heap->CollectGarbage(i::NEW_SPACE);
@@ -4853,7 +4861,7 @@
   for (int i = 0; i < 10; i++) {
     CHECK(xValue.IsEmpty());
     script->Run();
-    CHECK_EQ(v8_num(4), Handle<Value>(*xValue));
+    CHECK_EQ(v8_num(4), Local<Value>::New(v8::Isolate::GetCurrent(), xValue));
     xValue.Dispose(context->GetIsolate());
     xValue.Clear();
   }
@@ -4870,7 +4878,7 @@
   for (int i = 0; i < 10; i++) {
     CHECK(xValue.IsEmpty());
     script->Run();
-    CHECK_EQ(v8_num(4), Handle<Value>(*xValue));
+    CHECK_EQ(v8_num(4), Local<Value>::New(v8::Isolate::GetCurrent(), xValue));
     xValue.Dispose(context->GetIsolate());
     xValue.Clear();
   }
@@ -5095,7 +5103,7 @@
       "for(i = 0; i < 80000; i++) { keys[i] = i; };"
       "keys.length = 25; keys;"));
   Local<Value> result = indexed_property_names_script->Run();
-  return Local<v8::Array>(::v8::Array::Cast(*result));
+  return Local<v8::Array>::Cast(result);
 }
 
 
@@ -5135,8 +5143,13 @@
       "}"
       "keys = f(0, 1, 2, 3);"
       "keys;"));
-  Local<Value> result = indexed_property_names_script->Run();
-  return Local<v8::Array>(static_cast<v8::Array*>(::v8::Object::Cast(*result)));
+  Local<Object> result =
+      Local<Object>::Cast(indexed_property_names_script->Run());
+  // Have to populate the handle manually, as it's not Cast-able.
+  i::Handle<i::JSObject> o =
+      v8::Utils::OpenHandle<Object, i::JSObject>(result);
+  i::Handle<i::JSArray> array(reinterpret_cast<i::JSArray*>(*o));
+  return v8::Utils::ToLocal(array);
 }
 
 
@@ -6247,7 +6260,7 @@
   ~Whammy() { script_.Dispose(isolate_); }
   v8::Handle<Script> getScript() {
     if (script_.IsEmpty()) script_.Reset(isolate_, v8_compile("({}).blammo"));
-    return Local<Script>(*script_);
+    return Local<Script>::New(isolate_, script_);
   }
 
  public:
@@ -6276,9 +6289,7 @@
   if (!prev.IsEmpty()) {
     v8::Local<v8::Object>::New(info.GetIsolate(), prev)
         ->Set(v8_str("next"), obj);
-    prev.MakeWeak<Value, Snorkel>(info.GetIsolate(),
-                                  new Snorkel(),
-                                  &HandleWeakReference);
+    prev.MakeWeak<Value, Snorkel>(new Snorkel(), &HandleWeakReference);
     whammy->objects_[whammy->cursor_].Clear();
   }
   whammy->objects_[whammy->cursor_].Reset(info.GetIsolate(), obj);
@@ -6340,8 +6351,8 @@
 
   bool object_a_disposed = false;
   bool object_b_disposed = false;
-  object_a.MakeWeak(iso, &object_a_disposed, &DisposeAndSetFlag);
-  object_b.MakeWeak(iso, &object_b_disposed, &DisposeAndSetFlag);
+  object_a.MakeWeak(&object_a_disposed, &DisposeAndSetFlag);
+  object_b.MakeWeak(&object_b_disposed, &DisposeAndSetFlag);
   CHECK(!object_b.IsIndependent(iso));
   object_a.MarkIndependent(iso);
   object_b.MarkIndependent(iso);
@@ -6402,7 +6413,7 @@
         object.Reset(isolate, v8::Object::New());
       }
       bool disposed = false;
-      object.MakeWeak(isolate, &disposed, gc_forcing_callback[inner_gc]);
+      object.MakeWeak(&disposed, gc_forcing_callback[inner_gc]);
       object.MarkIndependent(isolate);
       invoke_gc[outer_gc]();
       CHECK(disposed);
@@ -6435,7 +6446,7 @@
     o->Set(y_str, y_str);
   }
   bool revived = false;
-  object.MakeWeak(isolate, &revived, &RevivingCallback);
+  object.MakeWeak(&revived, &RevivingCallback);
   object.MarkIndependent(isolate);
   HEAP->PerformScavenge();
   CHECK(revived);
@@ -7211,12 +7222,12 @@
   Local<Value> s2 = global->Get(v8_str("sym2"));
   Local<Value> s3 = global->Get(v8_str("sym3"));
   Local<Value> s4 = global->Get(v8_str("sym4"));
-  CHECK(SameSymbol(sym0, Handle<String>(String::Cast(*s0))));
-  CHECK(SameSymbol(sym0b, Handle<String>(String::Cast(*s0b))));
-  CHECK(SameSymbol(sym1, Handle<String>(String::Cast(*s1))));
-  CHECK(SameSymbol(sym2, Handle<String>(String::Cast(*s2))));
-  CHECK(SameSymbol(sym3, Handle<String>(String::Cast(*s3))));
-  CHECK(SameSymbol(sym4, Handle<String>(String::Cast(*s4))));
+  CHECK(SameSymbol(sym0, Handle<String>::Cast(s0)));
+  CHECK(SameSymbol(sym0b, Handle<String>::Cast(s0b)));
+  CHECK(SameSymbol(sym1, Handle<String>::Cast(s1)));
+  CHECK(SameSymbol(sym2, Handle<String>::Cast(s2)));
+  CHECK(SameSymbol(sym3, Handle<String>::Cast(s3)));
+  CHECK(SameSymbol(sym4, Handle<String>::Cast(s4)));
 }
 
 
@@ -12161,9 +12172,7 @@
   // global handle nodes are processed by PostGarbageCollectionProcessing
   // in reverse allocation order, so if second allocated handle is deleted,
   // weak callback of the first handle would be able to 'reallocate' it.
-  handle1.MakeWeak<v8::Value, void>(isolate,
-                                    NULL,
-                                    NewPersistentHandleCallback);
+  handle1.MakeWeak<v8::Value, void>(NULL, NewPersistentHandleCallback);
   handle2.Dispose(isolate);
   HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
 }
@@ -12190,7 +12199,7 @@
     handle1.Reset(isolate, v8::Object::New());
     handle2.Reset(isolate, v8::Object::New());
   }
-  handle1.MakeWeak<v8::Value, void>(isolate, NULL, DisposeAndForceGcCallback);
+  handle1.MakeWeak<v8::Value, void>(NULL, DisposeAndForceGcCallback);
   to_be_disposed.Reset(isolate, handle2);
   HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
 }
@@ -12205,7 +12214,7 @@
                             v8::Persistent<v8::Value>* handle,
                             void*) {
   v8::HandleScope scope(isolate);
-  v8::Persistent<v8::Object>::New(isolate, v8::Object::New());
+  v8::Persistent<v8::Object>(isolate, v8::Object::New());
   handle->Dispose(isolate);
 }
 
@@ -12221,8 +12230,8 @@
     handle2.Reset(isolate, v8::Object::New());
     handle1.Reset(isolate, v8::Object::New());
   }
-  handle2.MakeWeak<v8::Value, void>(isolate, NULL, DisposingCallback);
-  handle3.MakeWeak<v8::Value, void>(isolate, NULL, HandleCreatingCallback);
+  handle2.MakeWeak<v8::Value, void>(NULL, DisposingCallback);
+  handle3.MakeWeak<v8::Value, void>(NULL, HandleCreatingCallback);
   HEAP->CollectAllGarbage(i::Heap::kNoGCFlags);
 }
 
@@ -19297,10 +19306,10 @@
   LocalContext context;
   v8::HandleScope scope(context->GetIsolate());
   Local<Value> set_value = CompileRun("new Set();");
-  Local<Object> set_object(Object::Cast(*set_value));
+  Local<Object> set_object(Local<Object>::Cast(set_value));
   CHECK_EQ(0, set_object->InternalFieldCount());
   Local<Value> map_value = CompileRun("new Map();");
-  Local<Object> map_object(Object::Cast(*map_value));
+  Local<Object> map_object(Local<Object>::Cast(map_value));
   CHECK_EQ(0, map_object->InternalFieldCount());
 }
 
diff --git a/test/cctest/test-cpu-profiler.cc b/test/cctest/test-cpu-profiler.cc
index 95930b4..a615fe9 100644
--- a/test/cctest/test-cpu-profiler.cc
+++ b/test/cctest/test-cpu-profiler.cc
@@ -917,89 +917,3 @@
 
   cpu_profiler->DeleteAllCpuProfiles();
 }
-
-
-static const char* cpu_profiler_sourceURL_source =
-"function start(timeout) {\n"
-"  var start = Date.now();\n"
-"  var duration = 0;\n"
-"  do {\n"
-"    try {\n"
-"      duration = Date.now() - start;\n"
-"    } catch(e) { }\n"
-"  } while (duration < timeout);\n"
-"  return duration;\n"
-"}\n"
-"//# sourceURL=cpu_profiler_sourceURL_source.js";
-
-
-TEST(SourceURLSupportForNewFunctions) {
-  LocalContext env;
-  v8::HandleScope scope(env->GetIsolate());
-
-  v8::Script::Compile(v8::String::New(cpu_profiler_sourceURL_source))->Run();
-  v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
-      env->Global()->Get(v8::String::New("start")));
-  v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
-  int32_t profiling_interval_ms = 200;
-#if defined(_WIN32) || defined(_WIN64)
-  // 200ms is not enough on Windows. See
-  // https://code.google.com/p/v8/issues/detail?id=2628
-  profiling_interval_ms = 500;
-#endif
-
-  // Cold run.
-  v8::Local<v8::String> profile_name = v8::String::New("my_profile");
-  cpu_profiler->StartCpuProfiling(profile_name);
-  v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
-  function->Call(env->Global(), ARRAY_SIZE(args), args);
-  const v8::CpuProfile* profile = cpu_profiler->StopCpuProfiling(profile_name);
-  CHECK_NE(NULL, profile);
-
-  // Dump collected profile to have a better diagnostic in case of failure.
-  reinterpret_cast<i::CpuProfile*>(
-      const_cast<v8::CpuProfile*>(profile))->Print();
-  const v8::CpuProfileNode* root = profile->GetTopDownRoot();
-  const v8::CpuProfileNode* startNode = GetChild(root, "start");
-
-  CHECK_EQ(v8::String::New("cpu_profiler_sourceURL_source.js"),
-           startNode->GetScriptResourceName());
-
-  cpu_profiler->DeleteAllCpuProfiles();
-}
-
-TEST(LogExistingFunctionSourceURLCheck) {
-  LocalContext env;
-  v8::HandleScope scope(env->GetIsolate());
-
-  v8::Script::Compile(v8::String::New(cpu_profiler_sourceURL_source))->Run();
-  v8::Local<v8::Function> function = v8::Local<v8::Function>::Cast(
-      env->Global()->Get(v8::String::New("start")));
-  v8::CpuProfiler* cpu_profiler = env->GetIsolate()->GetCpuProfiler();
-  int32_t profiling_interval_ms = 200;
-
-  // Warm up.
-  v8::Handle<v8::Value> args[] = { v8::Integer::New(profiling_interval_ms) };
-  function->Call(env->Global(), ARRAY_SIZE(args), args);
-
-#if defined(_WIN32) || defined(_WIN64)
-  // 200ms is not enough on Windows. See
-  // https://code.google.com/p/v8/issues/detail?id=2628
-  profiling_interval_ms = 500;
-#endif
-  v8::Local<v8::String> profile_name = v8::String::New("my_profile");
-  cpu_profiler->StartCpuProfiling(profile_name);
-  function->Call(env->Global(), ARRAY_SIZE(args), args);
-  const v8::CpuProfile* profile = cpu_profiler->StopCpuProfiling(profile_name);
-  CHECK_NE(NULL, profile);
-
-  // Dump collected profile to have a better diagnostic in case of failure.
-  reinterpret_cast<i::CpuProfile*>(
-      const_cast<v8::CpuProfile*>(profile))->Print();
-  const v8::CpuProfileNode* root = profile->GetTopDownRoot();
-  const v8::CpuProfileNode* startNode = GetChild(root, "start");
-  CHECK_EQ(v8::String::New("cpu_profiler_sourceURL_source.js"),
-           startNode->GetScriptResourceName());
-
-  cpu_profiler->DeleteAllCpuProfiles();
-}
diff --git a/test/cctest/test-debug.cc b/test/cctest/test-debug.cc
index b22092a..ed79205 100644
--- a/test/cctest/test-debug.cc
+++ b/test/cctest/test-debug.cc
@@ -143,6 +143,7 @@
   inline ~DebugLocalContext() {
     context_->Exit();
   }
+  inline v8::Local<v8::Context> context() { return context_; }
   inline v8::Context* operator->() { return *context_; }
   inline v8::Context* operator*() { return *context_; }
   inline bool IsReady() { return !context_.IsEmpty(); }
@@ -788,8 +789,8 @@
     // Check whether the exception was uncaught.
     v8::Local<v8::String> fun_name = v8::String::New("uncaught");
     v8::Local<v8::Function> fun =
-        v8::Function::Cast(*event_data->Get(fun_name));
-    v8::Local<v8::Value> result = *fun->Call(event_data, 0, NULL);
+        v8::Local<v8::Function>::Cast(event_data->Get(fun_name));
+    v8::Local<v8::Value> result = fun->Call(event_data, 0, NULL);
     if (result->IsTrue()) {
       uncaught_exception_hit_count++;
     }
@@ -6457,7 +6458,7 @@
   // Enter and run function in the context.
   {
     v8::Context::Scope context_scope(context_1);
-    expected_context = v8::Local<v8::Context>(*context_1);
+    expected_context = context_1;
     expected_context_data = data_1;
     v8::Local<v8::Function> f = CompileFunction(source, "f");
     f->Call(context_1->Global(), 0, NULL);
@@ -7041,11 +7042,11 @@
   if (event == v8::Break) {
     break_point_hit_count++;
     CHECK(debugger_context == v8::Context::GetCurrent());
-    v8::Handle<v8::Function> func(v8::Function::Cast(*CompileRun(
+    v8::Handle<v8::Function> func = v8::Handle<v8::Function>::Cast(CompileRun(
         "(function(exec_state) {\n"
         "    return (exec_state.frame(0).argumentValue(0).property('a').\n"
         "            value().value() == 1);\n"
-        "})")));
+        "})"));
     const int argc = 1;
     v8::Handle<v8::Value> argv[argc] = { exec_state };
     v8::Handle<v8::Value> result = func->Call(exec_state, argc, argv);
@@ -7063,7 +7064,7 @@
 
   // Save handles to the debugger and debugee contexts to be used in
   // NamedGetterWithCallingContextCheck.
-  debugee_context = v8::Local<v8::Context>(*env);
+  debugee_context = env.context();
   debugger_context = v8::Utils::ToLocal(debug->debug_context());
 
   // Create object with 'a' property accessor.
diff --git a/test/cctest/test-declarative-accessors.cc b/test/cctest/test-declarative-accessors.cc
index a14c7fa..2d2f5cd 100644
--- a/test/cctest/test-declarative-accessors.cc
+++ b/test/cctest/test-declarative-accessors.cc
@@ -120,8 +120,8 @@
   CreateConstructor(context, "Accessible", internal_field, "x", descriptor);
   // Setup object.
   CompileRun("var accessible = new Accessible();");
-  v8::Local<v8::Object> obj(
-      v8::Object::Cast(*context->Global()->Get(v8_str("accessible"))));
+  v8::Local<v8::Object> obj = v8::Local<v8::Object>::Cast(
+      context->Global()->Get(v8_str("accessible")));
   obj->SetAlignedPointerInInternalField(internal_field, internal_object);
   bool added_accessor;
   added_accessor = obj->SetAccessor(v8_str("y"), descriptor);
diff --git a/test/cctest/test-global-object.cc b/test/cctest/test-global-object.cc
index e8ffb8b..b124b27 100644
--- a/test/cctest/test-global-object.cc
+++ b/test/cctest/test-global-object.cc
@@ -36,7 +36,7 @@
 TEST(StrictUndeclaredGlobalVariable) {
   HandleScope scope(Isolate::GetCurrent());
   v8::Local<v8::String> var_name = v8_str("x");
-  v8::LocalContext context;
+  LocalContext context;
   v8::TryCatch try_catch;
   v8::Local<v8::Script> script = v8_compile("\"use strict\"; x = 42;");
   v8::Handle<v8::Object> proto = v8::Object::New();
diff --git a/test/cctest/test-heap-profiler.cc b/test/cctest/test-heap-profiler.cc
index 254cd1e..33b0fb9 100644
--- a/test/cctest/test-heap-profiler.cc
+++ b/test/cctest/test-heap-profiler.cc
@@ -1605,9 +1605,7 @@
   CHECK(!HasWeakGlobalHandle());
 
   v8::Persistent<v8::Object> handle(env->GetIsolate(), v8::Object::New());
-  handle.MakeWeak<v8::Value, void>(env->GetIsolate(),
-                                   NULL,
-                                   PersistentHandleCallback);
+  handle.MakeWeak<v8::Value, void>(NULL, PersistentHandleCallback);
 
   CHECK(HasWeakGlobalHandle());
 }
diff --git a/test/cctest/test-heap.cc b/test/cctest/test-heap.cc
index 72d124f..d60deed 100644
--- a/test/cctest/test-heap.cc
+++ b/test/cctest/test-heap.cc
@@ -2689,6 +2689,7 @@
 
 
 TEST(Regression144230) {
+  i::FLAG_stress_compaction = false;
   CcTest::InitializeVM();
   Isolate* isolate = Isolate::Current();
   Heap* heap = isolate->heap();
diff --git a/test/cctest/test-log.cc b/test/cctest/test-log.cc
index d2ef02d..5daf8dd 100644
--- a/test/cctest/test-log.cc
+++ b/test/cctest/test-log.cc
@@ -405,8 +405,7 @@
                                            v8::FunctionTemplate::New());
   obj->SetClassName(v8_str("Obj"));
   v8::Handle<v8::ObjectTemplate> proto = obj->PrototypeTemplate();
-  v8::Local<v8::Signature> signature =
-      v8::Signature::New(v8::Handle<v8::FunctionTemplate>(*obj));
+  v8::Local<v8::Signature> signature = v8::Signature::New(obj);
   proto->Set(v8_str("method1"),
              v8::FunctionTemplate::New(ObjMethod1,
                                        v8::Handle<v8::Value>(),
diff --git a/test/cctest/test-mark-compact.cc b/test/cctest/test-mark-compact.cc
index f6f2172..4487c16 100644
--- a/test/cctest/test-mark-compact.cc
+++ b/test/cctest/test-mark-compact.cc
@@ -557,7 +557,7 @@
       }
     } else {                            // 32-bit.
       if (v8::internal::Snapshot::IsEnabled()) {
-        CHECK_LE(delta, 2910 * 1024);
+        CHECK_LE(delta, 2942 * 1024);
       } else {
         CHECK_LE(delta, 3400 * 1024);
       }
diff --git a/test/cctest/test-object-observe.cc b/test/cctest/test-object-observe.cc
index 0dd0265..3778fed 100644
--- a/test/cctest/test-object-observe.cc
+++ b/test/cctest/test-object-observe.cc
@@ -57,7 +57,7 @@
 TEST(PerIsolateState) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context1;
+  LocalContext context1;
   CompileRun(
       "var count = 0;"
       "var calls = 0;"
@@ -70,20 +70,20 @@
       "(function() { obj.foo = 'bar'; })");
   Handle<Value> notify_fun2;
   {
-    v8::LocalContext context2;
+    LocalContext context2;
     context2->Global()->Set(String::New("obj"), obj);
     notify_fun2 = CompileRun(
         "(function() { obj.foo = 'baz'; })");
   }
   Handle<Value> notify_fun3;
   {
-    v8::LocalContext context3;
+    LocalContext context3;
     context3->Global()->Set(String::New("obj"), obj);
     notify_fun3 = CompileRun(
         "(function() { obj.foo = 'bat'; })");
   }
   {
-    v8::LocalContext context4;
+    LocalContext context4;
     context4->Global()->Set(String::New("observer"), observer);
     context4->Global()->Set(String::New("fun1"), notify_fun1);
     context4->Global()->Set(String::New("fun2"), notify_fun2);
@@ -97,7 +97,7 @@
 TEST(EndOfMicrotaskDelivery) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   CompileRun(
       "var obj = {};"
       "var count = 0;"
@@ -110,7 +110,7 @@
 TEST(DeliveryOrdering) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   CompileRun(
       "var obj1 = {};"
       "var obj2 = {};"
@@ -141,7 +141,7 @@
 TEST(DeliveryOrderingReentrant) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   CompileRun(
       "var obj = {};"
       "var reentered = false;"
@@ -172,7 +172,7 @@
 TEST(DeliveryOrderingDeliverChangeRecords) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   CompileRun(
       "var obj = {};"
       "var ordering = [];"
@@ -197,14 +197,14 @@
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
   // Initializing this context sets up initial hash tables.
-  v8::LocalContext context;
+  LocalContext context;
   Handle<Value> obj = CompileRun("obj = {};");
   Handle<Value> observer = CompileRun(
       "var ran = false;"
       "(function() { ran = true })");
   {
     // As does initializing this context.
-    v8::LocalContext context2;
+    LocalContext context2;
     context2->Global()->Set(String::New("obj"), obj);
     context2->Global()->Set(String::New("observer"), observer);
     CompileRun(
@@ -224,7 +224,7 @@
 
 TEST(GlobalObjectObservation) {
   HarmonyIsolate isolate;
-  v8::LocalContext context;
+  LocalContext context;
   HandleScope scope(isolate.GetIsolate());
   Handle<Object> global_proxy = context->Global();
   Handle<Object> inner_global = global_proxy->GetPrototype().As<Object>();
@@ -256,7 +256,7 @@
   // to the old context.
   context->DetachGlobal();
   {
-    v8::LocalContext context2;
+    LocalContext context2;
     context2->DetachGlobal();
     context2->ReattachGlobal(global_proxy);
     CompileRun(
@@ -271,7 +271,7 @@
   // Attaching by passing to Context::New
   {
     // Delegates to Context::New
-    v8::LocalContext context3(NULL, Handle<ObjectTemplate>(), global_proxy);
+    LocalContext context3(NULL, Handle<ObjectTemplate>(), global_proxy);
     CompileRun(
         "var records3 = [];"
         "Object.observe(this, function(r) { [].push.apply(records3, r) });"
@@ -320,7 +320,7 @@
 TEST(APITestBasicMutation) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   Handle<Object> obj = Handle<Object>::Cast(CompileRun(
       "var records = [];"
       "var obj = {};"
@@ -363,7 +363,7 @@
 TEST(HiddenPrototypeObservation) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   Handle<FunctionTemplate> tmpl = FunctionTemplate::New();
   tmpl->SetHiddenPrototype(true);
   tmpl->InstanceTemplate()->Set(String::New("foo"), Number::New(75));
@@ -412,7 +412,7 @@
 TEST(ObservationWeakMap) {
   HarmonyIsolate isolate;
   HandleScope scope(isolate.GetIsolate());
-  v8::LocalContext context;
+  LocalContext context;
   CompileRun(
       "var obj = {};"
       "Object.observe(obj, function(){});"
diff --git a/test/cctest/test-serialize.cc b/test/cctest/test-serialize.cc
index 20c00c1..08c1375 100644
--- a/test/cctest/test-serialize.cc
+++ b/test/cctest/test-serialize.cc
@@ -556,7 +556,7 @@
       v8::Local<v8::Context>::New(v8_isolate, env)->Exit();
     }
 
-    Object* raw_context = *(v8::Utils::OpenHandle(*env));
+    i::Object* raw_context = *v8::Utils::OpenPersistent(env);
 
     env.Dispose(v8_isolate);
 
diff --git a/test/cctest/test-weaktypedarrays.cc b/test/cctest/test-weaktypedarrays.cc
index ead5734..f2f6161 100644
--- a/test/cctest/test-weaktypedarrays.cc
+++ b/test/cctest/test-weaktypedarrays.cc
@@ -137,12 +137,12 @@
         CompileRun("var ab1 = new ArrayBuffer(256);"
                    "var ab2 = new ArrayBuffer(256);"
                    "var ab3 = new ArrayBuffer(256);");
-        v8::Handle<v8::ArrayBuffer> ab1(
-            v8::ArrayBuffer::Cast(*CompileRun("ab1")));
-        v8::Handle<v8::ArrayBuffer> ab2(
-            v8::ArrayBuffer::Cast(*CompileRun("ab2")));
-        v8::Handle<v8::ArrayBuffer> ab3(
-            v8::ArrayBuffer::Cast(*CompileRun("ab3")));
+        v8::Handle<v8::ArrayBuffer> ab1 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab1"));
+        v8::Handle<v8::ArrayBuffer> ab2 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab2"));
+        v8::Handle<v8::ArrayBuffer> ab3 =
+            v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab3"));
 
         CHECK_EQ(3, CountArrayBuffersInWeakList(isolate->heap()));
         CHECK(HasArrayBufferInWeakList(isolate->heap(),
@@ -166,8 +166,8 @@
         for (int j = 1; j <= 3; j++) {
           if (j == i) continue;
           i::OS::SNPrintF(source, "ab%d", j);
-          v8::Handle<v8::ArrayBuffer> ab(
-              v8::ArrayBuffer::Cast(*CompileRun(source.start())));
+          v8::Handle<v8::ArrayBuffer> ab =
+              v8::Handle<v8::ArrayBuffer>::Cast(CompileRun(source.start()));
           CHECK(HasArrayBufferInWeakList(isolate->heap(),
                 *v8::Utils::OpenHandle(*ab)));
           }
@@ -285,10 +285,14 @@
                   constructor, constructor, constructor);
 
       CompileRun(source.start());
-      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
-      v8::Handle<TypedArray> ta1(TypedArray::Cast(*CompileRun("ta1")));
-      v8::Handle<TypedArray> ta2(TypedArray::Cast(*CompileRun("ta2")));
-      v8::Handle<TypedArray> ta3(TypedArray::Cast(*CompileRun("ta3")));
+      v8::Handle<v8::ArrayBuffer> ab =
+          v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
+      v8::Handle<TypedArray> ta1 =
+          v8::Handle<TypedArray>::Cast(CompileRun("ta1"));
+      v8::Handle<TypedArray> ta2 =
+          v8::Handle<TypedArray>::Cast(CompileRun("ta2"));
+      v8::Handle<TypedArray> ta3 =
+          v8::Handle<TypedArray>::Cast(CompileRun("ta3"));
       CHECK_EQ(1, CountArrayBuffersInWeakList(isolate->heap()));
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
       CHECK_EQ(3, CountTypedArrays(*iab));
@@ -306,14 +310,15 @@
 
     {
       v8::HandleScope s2(context->GetIsolate());
-      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+      v8::Handle<v8::ArrayBuffer> ab =
+          v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
       CHECK_EQ(2, CountTypedArrays(*iab));
       for (int j = 1; j <= 3; j++) {
         if (j == i) continue;
         i::OS::SNPrintF(source, "ta%d", j);
-        v8::Handle<TypedArray> ta(
-            TypedArray::Cast(*CompileRun(source.start())));
+        v8::Handle<TypedArray> ta =
+            v8::Handle<TypedArray>::Cast(CompileRun(source.start()));
         CHECK(HasTypedArrayInWeakList(*iab, *v8::Utils::OpenHandle(*ta)));
       }
     }
@@ -326,7 +331,8 @@
 
     {
       v8::HandleScope s3(context->GetIsolate());
-      v8::Handle<v8::ArrayBuffer> ab(v8::ArrayBuffer::Cast(*CompileRun("ab")));
+      v8::Handle<v8::ArrayBuffer> ab =
+          v8::Handle<v8::ArrayBuffer>::Cast(CompileRun("ab"));
       Handle<JSArrayBuffer> iab = v8::Utils::OpenHandle(*ab);
       CHECK_EQ(0, CountTypedArrays(*iab));
     }
diff --git a/test/mjsunit/allocation-site-info.js b/test/mjsunit/allocation-site-info.js
index f533d61..69ee83e 100644
--- a/test/mjsunit/allocation-site-info.js
+++ b/test/mjsunit/allocation-site-info.js
@@ -315,7 +315,8 @@
     instanceof_check(realmBArray);
     %OptimizeFunctionOnNextCall(instanceof_check);
     instanceof_check(Array);
-    instanceof_check(realmBArray);
     assertTrue(2 != %GetOptimizationStatus(instanceof_check));
+    instanceof_check(realmBArray);
+    assertTrue(1 != %GetOptimizationStatus(instanceof_check));
   }
 }
diff --git a/test/mjsunit/array-constructor-feedback.js b/test/mjsunit/array-constructor-feedback.js
new file mode 100644
index 0000000..d723121
--- /dev/null
+++ b/test/mjsunit/array-constructor-feedback.js
@@ -0,0 +1,106 @@
+// Copyright 2012 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
+// Flags: --track-allocation-sites --noalways-opt
+
+// Test element kind of objects.
+// Since --smi-only-arrays affects builtins, its default setting at compile
+// time sticks if built with snapshot.  If --smi-only-arrays is deactivated
+// by default, only a no-snapshot build actually has smi-only arrays enabled
+// in this test case.  Depending on whether smi-only arrays are actually
+// enabled, this test takes the appropriate code path to check smi-only arrays.
+
+// support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
+support_smi_only_arrays = true;
+optimize_constructed_arrays = true;
+
+if (support_smi_only_arrays) {
+  print("Tests include smi-only arrays.");
+} else {
+  print("Tests do NOT include smi-only arrays.");
+}
+
+if (optimize_constructed_arrays) {
+  print("Tests include constructed array optimizations.");
+} else {
+  print("Tests do NOT include constructed array optimizations.");
+}
+
+var elements_kind = {
+  fast_smi_only            :  'fast smi only elements',
+  fast                     :  'fast elements',
+  fast_double              :  'fast double elements',
+  dictionary               :  'dictionary elements',
+  external_byte            :  'external byte elements',
+  external_unsigned_byte   :  'external unsigned byte elements',
+  external_short           :  'external short elements',
+  external_unsigned_short  :  'external unsigned short elements',
+  external_int             :  'external int elements',
+  external_unsigned_int    :  'external unsigned int elements',
+  external_float           :  'external float elements',
+  external_double          :  'external double elements',
+  external_pixel           :  'external pixel elements'
+}
+
+function getKind(obj) {
+  if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
+  if (%HasFastObjectElements(obj)) return elements_kind.fast;
+  if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
+  if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
+}
+
+function isHoley(obj) {
+  if (%HasFastHoleyElements(obj)) return true;
+  return false;
+}
+
+function assertKind(expected, obj, name_opt) {
+  if (!support_smi_only_arrays &&
+      expected == elements_kind.fast_smi_only) {
+    expected = elements_kind.fast;
+  }
+  assertEquals(expected, getKind(obj), name_opt);
+}
+
+if (support_smi_only_arrays && optimize_constructed_arrays) {
+  function bar0(t) {
+    return new t();
+  }
+
+  a = bar0(Array);
+  a[0] = 3.5;
+  b = bar0(Array);
+  assertKind(elements_kind.fast_double, b);
+  %OptimizeFunctionOnNextCall(bar0);
+  b = bar0(Array);
+  assertKind(elements_kind.fast_double, b);
+  assertTrue(2 != %GetOptimizationStatus(bar0));
+  // bar0 should deopt
+  b = bar0(Object);
+  assertTrue(1 != %GetOptimizationStatus(bar0));
+}
diff --git a/test/mjsunit/harmony/generators-iteration.js b/test/mjsunit/harmony/generators-iteration.js
index 2ca35f2..dc210d5 100644
--- a/test/mjsunit/harmony/generators-iteration.js
+++ b/test/mjsunit/harmony/generators-iteration.js
@@ -346,6 +346,36 @@
     "foo",
     [3, undefined]);
 
+// Test that yield* re-yields received results without re-boxing.
+function TestDelegatingYield() {
+  function results(results) {
+    var i = 0;
+    function next() {
+      return results[i++];
+    }
+    return { next: next }
+  }
+  function* yield_results(expected) {
+    return yield* results(expected);
+  }
+  function collect_results(iter) {
+    var ret = [];
+    var result;
+    do {
+      result = iter.next();
+      ret.push(result);
+    } while (!result.done);
+    return ret;
+  }
+  // We have to put a full result for the end, because the return will re-box.
+  var expected = [{value: 1}, 13, "foo", {value: 34, done: true}];
+
+  // Sanity check.
+  assertEquals(expected, collect_results(results(expected)));
+  assertEquals(expected, collect_results(yield_results(expected)));
+}
+TestDelegatingYield();
+
 function TestTryCatch(instantiate) {
   function* g() { yield 1; try { yield 2; } catch (e) { yield e; } yield 3; }
   function Sentinel() {}
diff --git a/test/mjsunit/regress/regress-2691.js b/test/mjsunit/regress/regress-2691.js
new file mode 100644
index 0000000..e17be10
--- /dev/null
+++ b/test/mjsunit/regress/regress-2691.js
@@ -0,0 +1,34 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//     * Redistributions of source code must retain the above copyright
+//       notice, this list of conditions and the following disclaimer.
+//     * Redistributions in binary form must reproduce the above
+//       copyright notice, this list of conditions and the following
+//       disclaimer in the documentation and/or other materials provided
+//       with the distribution.
+//     * Neither the name of Google Inc. nor the names of its
+//       contributors may be used to endorse or promote products derived
+//       from this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+// Flags: --harmony-generators
+
+// Check that yield* on non-objects raises a TypeError.
+
+assertThrows('(function*() { yield* 10 })().next()', TypeError);
+assertThrows('(function*() { yield* {} })().next()', TypeError);
+assertThrows('(function*() { yield* undefined })().next()', TypeError);