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

Source/core/html/HTMLOptionElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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
@@ skipping 48 matching lines @@
     void setLabel(const String&);
 
     bool ownElementDisabled() const { return m_disabled; }
 
     virtual bool isDisabledFormControl() const OVERRIDE;
 
     String textIndentedToRespectGroupLabel() const;
 
     void setSelectedState(bool);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     HTMLOptionElement(const QualifiedName&, Handle<Document>);
 
     virtual bool supportsFocus() const;
     virtual bool isFocusable() const;
     virtual bool rendererIsNeeded(const NodeRenderingContext&) { return false; }
     virtual void attach();
     virtual void detach();
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
@@ skipping 33 matching lines @@
 inline const HTMLOptionElement* toHTMLOptionElement(const Node* node)
 {
     return static_cast<const HTMLOptionElement*>(node);
 }
 
 #endif
 
 } // namespace
 
 #endif