[oilpan]: optimize the way we allocate persistent handles in wrappers.

Source/bindings/tests/results/V8TestInterfaceEmpty.cpp

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // This file has been auto-generated by code_generator_v8.py. DO NOT MODIFY!
 
 #include "config.h"
 #include "V8TestInterfaceEmpty.h"
 
 #include "bindings/core/v8/ExceptionState.h"
@@ skipping 102 matching lines @@
 void V8TestInterfaceEmpty::refObject(ScriptWrappableBase* internalPointer)
 {
     fromInternalPointer(internalPointer)->ref();
 }
 
 void V8TestInterfaceEmpty::derefObject(ScriptWrappableBase* internalPointer)
 {
     fromInternalPointer(internalPointer)->deref();
 }
 
-PersistentNode* V8TestInterfaceEmpty::createPersistentHandle(ScriptWrappableBase* internalPointer)
+WrapperPersistentNode* V8TestInterfaceEmpty::createPersistentHandle(ScriptWrappableBase* internalPointer)
 {
     ASSERT_NOT_REACHED();
     return 0;
 }
 
 template<>
 v8::Handle<v8::Value> toV8NoInline(TestInterfaceEmpty* impl, v8::Handle<v8::Object> creationContext, v8::Isolate* isolate)
 {
     return toV8(impl, creationContext, isolate);
 }
 
 } // namespace blink