Oilpan: move 2D Canvas and WebGL objects to the heap.

Source/core/html/canvas/CanvasPattern.h

 /*
  * Copyright (C) 2006, 2008 Apple 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
@@ skipping 19 matching lines @@
 #include "platform/graphics/Pattern.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace blink {
 
 class ExceptionState;
 class Image;
 
-class CanvasPattern : public RefCounted<CanvasPattern>, public ScriptWrappable {
+class CanvasPattern FINAL : public RefCountedWillBeGarbageCollectedFinalized<CanvasPattern>, public ScriptWrappable {
 public:
     static void parseRepetitionType(const String&, bool& repeatX, bool& repeatY, ExceptionState&);
 
-    static PassRefPtr<CanvasPattern> create(PassRefPtr<Image> image, bool repeatX, bool repeatY, bool originClean)
+    static PassRefPtrWillBeRawPtr<CanvasPattern> create(PassRefPtr<Image> image, bool repeatX, bool repeatY, bool originClean)
     {
-        return adoptRef(new CanvasPattern(image, repeatX, repeatY, originClean));
+        return adoptRefWillBeNoop(new CanvasPattern(image, repeatX, repeatY, originClean));
     }
 
     Pattern* pattern() const { return m_pattern.get(); }
 
     bool originClean() const { return m_originClean; }
 
+    void trace(Visitor*) { }
+
 private:
     CanvasPattern(PassRefPtr<Image>, bool repeatX, bool repeatY, bool originClean);
 
     RefPtr<Pattern> m_pattern;
     bool m_originClean;
 };
 
 } // namespace blink
 
 #endif