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

Source/core/dom/Attr.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Peter Kelly (pmk@post.com)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 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
@@ skipping 46 matching lines @@
 
     bool isId() const;
 
     Result<CSSStyleDeclaration> style();
 
     void setSpecified(bool specified) { m_specified = specified; }
 
     void attachToElement(Element*);
     void detachFromElementWithValue(const AtomicString&);
 
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
+
 private:
     Attr(Element*, const QualifiedName&);
     Attr(Handle<Document>, const QualifiedName&, const AtomicString& value);
 
     void createTextChild();
 
     virtual String nodeName() const OVERRIDE { return name(); }
     virtual NodeType nodeType() const OVERRIDE { return ATTRIBUTE_NODE; }
 
     const AtomicString& localName() const { return m_name.localName(); }
@@ skipping 24 matching lines @@
     AtomicString m_standaloneValue;
 
     Persistent<StylePropertySet> m_style;
     unsigned m_ignoreChildrenChanged : 31;
     bool m_specified : 1;
 };
 
 } // namespace WebCore
 
 #endif // Attr_h