Oilpan: DOM wrappers don't need to keep persistent handles

Source/bindings/core/v8/custom/V8ArrayBufferCustom.cpp

 /*
  * Copyright (C) 2009 Google Inc. 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
@@ skipping 32 matching lines @@
 {
     DEFINE_STATIC_LOCAL(V8ArrayBufferDeallocationObserver, deallocationObserver, ());
     return &deallocationObserver;
 }
 
 const WrapperTypeInfo V8ArrayBuffer::wrapperTypeInfo = {
     gin::kEmbedderBlink,
     0,
     V8ArrayBuffer::refObject,
     V8ArrayBuffer::derefObject,
-    V8ArrayBuffer::createPersistentHandle,
+    V8ArrayBuffer::trace,
     0, 0, 0, 0, 0, 0,
     WrapperTypeInfo::WrapperTypeObjectPrototype,
     WrapperTypeInfo::ObjectClassId,
     WrapperTypeInfo::Independent,
     WrapperTypeInfo::RefCountedObject
 };
 
 bool V8ArrayBuffer::hasInstance(v8::Handle<v8::Value> value, v8::Isolate*)
 {
     return value->IsArrayBuffer();
 }
 
 void V8ArrayBuffer::refObject(ScriptWrappableBase* internalPointer)
 {
     toImpl(internalPointer)->ref();
 }
 
 void V8ArrayBuffer::derefObject(ScriptWrappableBase* internalPointer)
 {
     toImpl(internalPointer)->deref();
 }
 
-WrapperPersistentNode* V8ArrayBuffer::createPersistentHandle(ScriptWrappableBase* internalPointer)
-{
-    ASSERT_NOT_REACHED();
-    return 0;
-}
-
 v8::Handle<v8::Object> V8ArrayBuffer::createWrapper(PassRefPtr<ArrayBuffer> impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     ASSERT(impl.get());
     ASSERT(!DOMDataStore::containsWrapper<V8ArrayBuffer>(impl.get(), isolate));
 
     v8::Handle<v8::Object> wrapper = v8::ArrayBuffer::New(isolate, impl->data(), impl->byteLength());
     impl->setDeallocationObserver(V8ArrayBufferDeallocationObserver::instanceTemplate());
 
     V8DOMWrapper::associateObjectWithWrapper<V8ArrayBuffer>(impl, &wrapperTypeInfo, wrapper, isolate);
     return wrapper;
@@ skipping 22 matching lines @@
     return V8ArrayBuffer::hasInstance(value, isolate) ? V8ArrayBuffer::toImpl(v8::Handle<v8::Object>::Cast(value)) : 0;
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(ArrayBuffer* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace blink