Oilpan: move DOM string collection objects to the Oilpan heap.

Source/core/dom/DOMStringList.h

 /*
  * Copyright (C) 2010 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
  *    documentation and/or other materials provided with the distribution.
  *
  * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
  * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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 #ifndef DOMStringList_h
 #define DOMStringList_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/Vector.h"
 #include "wtf/text/WTFString.h"
 
 namespace WebCore {
 
 // FIXME: Some consumers of this class may benefit from lazily fetching items rather
 //        than creating the list statically as is currently the only option.
-class DOMStringList : public ScriptWrappable, public RefCounted<DOMStringList> {
+class DOMStringList FINAL : public RefCountedWillBeGarbageCollectedFinalized<DOMStringList>, public ScriptWrappable {
 public:
-    static PassRefPtr<DOMStringList> create()
+    static PassRefPtrWillBeRawPtr<DOMStringList> create()
     {
-        return adoptRef(new DOMStringList());
+        return adoptRefWillBeNoop(new DOMStringList());
     }
 
     bool isEmpty() const { return m_strings.isEmpty(); }
     void clear() { m_strings.clear(); }
     void append(const String& string) { m_strings.append(string); }
     void sort();
 
     // Implements the IDL.
     size_t length() const { return m_strings.size(); }
     String item(unsigned index) const;
     bool contains(const String& str) const;
 
     operator const Vector<String>&() const { return m_strings; }
 
+    void trace(Visitor*) { }
+
 private:
     DOMStringList()
     {
         ScriptWrappable::init(this);
     }
 
     Vector<String> m_strings;
 };
 
 } // namespace WebCore
 
 #endif // DOMStringList_h