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

Source/core/html/canvas/CanvasGradient.h

 /*
  * Copyright (C) 2006, 2007, 2008 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp@atoker.com>
  *
  * 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
@@ skipping 11 matching lines @@
  * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef CanvasGradient_h
 #define CanvasGradient_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/graphics/Gradient.h"
+#include "platform/heap/Handle.h"
 #include "wtf/Forward.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
 class ExceptionState;
 
-class CanvasGradient : public RefCounted<CanvasGradient>, public ScriptWrappable {
+class CanvasGradient FINAL : public RefCountedWillBeGarbageCollectedFinalized<CanvasGradient>, public ScriptWrappable {
 public:
-    static PassRefPtr<CanvasGradient> create(const FloatPoint& p0, const FloatPoint& p1)
+    static PassRefPtrWillBeRawPtr<CanvasGradient> create(const FloatPoint& p0, const FloatPoint& p1)
     {
-        return adoptRef(new CanvasGradient(p0, p1));
+        return adoptRefWillBeNoop(new CanvasGradient(p0, p1));
     }
-    static PassRefPtr<CanvasGradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1)
+    static PassRefPtrWillBeRawPtr<CanvasGradient> create(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1)
     {
-        return adoptRef(new CanvasGradient(p0, r0, p1, r1));
+        return adoptRefWillBeNoop(new CanvasGradient(p0, r0, p1, r1));
     }
 
     Gradient* gradient() const { return m_gradient.get(); }
 
     void addColorStop(float value, const String& color, ExceptionState&);
 
+    void trace(Visitor*) { }
+
 private:
     CanvasGradient(const FloatPoint& p0, const FloatPoint& p1);
     CanvasGradient(const FloatPoint& p0, float r0, const FloatPoint& p1, float r1);
 
     RefPtr<Gradient> m_gradient;
 };
 
 } //namespace
 
 #endif