[oilpan] The Node hierarchy should have correct accept method chains

Source/core/dom/EntityReference.h

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006, 2008 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
@@ skipping 12 matching lines @@
 #define EntityReference_h
 
 #include "core/dom/ContainerNode.h"
 
 namespace WebCore {
 
 class EntityReference : public ContainerNode {
 public:
     static PassRefPtr<EntityReference> create(Handle<Document>, const String& entityName);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     EntityReference(Handle<Document>, const String& entityName);
 
     virtual String nodeName() const;
     virtual NodeType nodeType() const;
     virtual PassRefPtr<Node> cloneNode(bool deep);
 
     String m_entityName;
 };
 
 } //namespace
 
 #endif