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

Source/core/dom/ShadowRoot.h

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 79 matching lines @@
     const ScopeContentDistribution* scopeDistribution() const { return m_scopeDistribution.get(); }
     ScopeContentDistribution* ensureScopeDistribution();
 
     ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); }
 
     PassRefPtr<Node> cloneNode(bool, ExceptionCode&);
 
     virtual void reportMemoryUsage(MemoryObjectInfo*) const OVERRIDE;
 
     virtual void visitWith(Visitor*) const;
-    virtual void acceptHeapVisitor(Visitor*) const;
+    virtual void acceptHeapVisitor(Visitor*) const OVERRIDE;
 
 private:
     ShadowRoot(Handle<Document>, ShadowRootType);
     virtual ~ShadowRoot();
 
     virtual bool childTypeAllowed(NodeType) const OVERRIDE;
     virtual void childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) OVERRIDE;
 
     // ShadowRoots should never be cloned.
     virtual PassRefPtr<Node> cloneNode(bool) OVERRIDE { return 0; }
 
     // FIXME: This shouldn't happen. https://bugs.webkit.org/show_bug.cgi?id=88834
     bool isOrphan() const { return !host(); }
 
+    // FIXME(oilpan): Change these to Members. We will need to modify DoublyLinkListNode.
     ShadowRoot* m_prev;
     ShadowRoot* m_next;
     OwnPtr<ScopeContentDistribution> m_scopeDistribution;
     unsigned m_numberOfStyles : 28;
     unsigned m_applyAuthorStyles : 1;
     unsigned m_resetStyleInheritance : 1;
     unsigned m_type : 1;
     unsigned m_registeredWithParentShadowRoot : 1;
 };
 
@@ skipping 11 matching lines @@
 }
 
 inline ShadowRoot* toShadowRoot(Node* node)
 {
     return const_cast<ShadowRoot*>(toShadowRoot(static_cast<const Node*>(node)));
 }
 
 } // namespace
 
 #endif