Oilpan: move Node traversal objects to the heap.

Source/core/dom/TreeWalker.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2000 Frederik Holljen (frederik.holljen@hig.no)
  * Copyright (C) 2001 Peter Kelly (pmk@post.com)
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 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
@@ skipping 10 matching lines @@
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef TreeWalker_h
 #define TreeWalker_h
 
 #include "bindings/v8/ScriptWrappable.h"
 #include "core/dom/NodeFilter.h"
 #include "core/dom/NodeIteratorBase.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class ExceptionState;
 
-class TreeWalker : public ScriptWrappable, public RefCounted<TreeWalker>, public NodeIteratorBase {
+class TreeWalker FINAL : public RefCountedWillBeGarbageCollectedFinalized<TreeWalker>, public ScriptWrappable, public NodeIteratorBase {
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(TreeWalker);
 public:
-    static PassRefPtr<TreeWalker> create(PassRefPtr<Node> rootNode, unsigned whatToShow, PassRefPtr<NodeFilter> filter)
+    static PassRefPtrWillBeRawPtr<TreeWalker> create(PassRefPtrWillBeRawPtr<Node> rootNode, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter> filter)
     {
-        return adoptRef(new TreeWalker(rootNode, whatToShow, filter));
+        return adoptRefWillBeNoop(new TreeWalker(rootNode, whatToShow, filter));
     }
 
     Node* currentNode() const { return m_current.get(); }
-    void setCurrentNode(PassRefPtr<Node>, ExceptionState&);
+    void setCurrentNode(PassRefPtrWillBeRawPtr<Node>, ExceptionState&);
 
     Node* parentNode(ExceptionState&);
     Node* firstChild(ExceptionState&);
     Node* lastChild(ExceptionState&);
     Node* previousSibling(ExceptionState&);
     Node* nextSibling(ExceptionState&);
     Node* previousNode(ExceptionState&);
     Node* nextNode(ExceptionState&);
 
+    void trace(Visitor*);
+
 private:
-    TreeWalker(PassRefPtr<Node>, unsigned whatToShow, PassRefPtr<NodeFilter>);
+    TreeWalker(PassRefPtrWillBeRawPtr<Node>, unsigned whatToShow, PassRefPtrWillBeRawPtr<NodeFilter>);
 
-    Node* setCurrent(PassRefPtr<Node>);
+    Node* setCurrent(PassRefPtrWillBeRawPtr<Node>);
 
-    RefPtr<Node> m_current;
+    RefPtrWillBeMember<Node> m_current;
 };
 
 } // namespace WebCore
 
 #endif // TreeWalker_h