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

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

 /*
  * Copyright (C) 2012 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:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 38 matching lines @@
     }
 };
 
 class V8ArrayBuffer {
 public:
     static bool hasInstance(v8::Handle<v8::Value>, v8::Isolate*);
     static ArrayBuffer* toImpl(v8::Handle<v8::Object>);
     static ArrayBuffer* toImplWithTypeCheck(v8::Isolate*, v8::Handle<v8::Value>);
     static void refObject(ScriptWrappableBase* internalPointer);
     static void derefObject(ScriptWrappableBase* internalPointer);
-    static WrapperPersistentNode* createPersistentHandle(ScriptWrappableBase* internalPointer);
+    static void trace(Visitor*, ScriptWrappableBase* internalPointer) { }
     static const WrapperTypeInfo wrapperTypeInfo;
     static const int internalFieldCount = v8DefaultWrapperInternalFieldCount;
 
     static inline ScriptWrappableBase* toScriptWrappableBase(ArrayBuffer* impl)
     {
         return reinterpret_cast<ScriptWrappableBase*>(impl);
     }
 
     static inline ArrayBuffer* toImpl(ScriptWrappableBase* internalPointer)
     {
@@ skipping 81 matching lines @@
 
 template<class CallbackInfo, class Wrappable>
 inline void v8SetReturnValueFast(const CallbackInfo& info, PassRefPtr< ArrayBuffer > impl, Wrappable* wrappable)
 {
     v8SetReturnValueFast(info, impl.get(), wrappable);
 }
 
 } // namespace blink
 
 #endif // V8ArrayBufferCustom_h