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

Source/core/dom/Notation.h

 /*
  * Copyright (C) 2000 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006, 2009 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 15 matching lines @@
 
 namespace WebCore {
 
 // FIXME: This class is never instantiated. Maybe it should be removed.
 
 class Notation : public ContainerNode {
 public:
     const String& publicId() const { return m_publicId; }
     const String& systemId() const { return m_systemId; }
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     Notation(Handle<Document>, const String& name, const String& publicId, const String& systemId);
 
     virtual String nodeName() const;
     virtual NodeType nodeType() const;
     virtual PassRefPtr<Node> cloneNode(bool deep);
     virtual bool childTypeAllowed(NodeType) const;
 
     String m_name;
     String m_publicId;
     String m_systemId;
 };
 
 } //namespace
 
 #endif