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

Source/core/html/canvas/WebGLShaderPrecisionFormat.h

 /*
  * Copyright (c) 2012, 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.
  *     * Redistributions in binary form must reproduce the above
  * copyright notice, this list of conditions and the following disclaimer
@@ skipping 11 matching lines @@
  * THEORY 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 WebGLShaderPrecisionFormat_h
 #define WebGLShaderPrecisionFormat_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "platform/graphics/GraphicsTypes3D.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 
 namespace WebCore {
 
-class WebGLShaderPrecisionFormat : public RefCounted<WebGLShaderPrecisionFormat>, public ScriptWrappable {
+class WebGLShaderPrecisionFormat FINAL : public RefCountedWillBeGarbageCollectedFinalized<WebGLShaderPrecisionFormat>, public ScriptWrappable {
 public:
-    static PassRefPtr<WebGLShaderPrecisionFormat> create(GLint rangeMin, GLint rangeMax, GLint precision);
+    static PassRefPtrWillBeRawPtr<WebGLShaderPrecisionFormat> create(GLint rangeMin, GLint rangeMax, GLint precision);
 
     GLint rangeMin() const;
     GLint rangeMax() const;
     GLint precision() const;
 
+    void trace(Visitor*) { }
+
 private:
     WebGLShaderPrecisionFormat(GLint rangeMin, GLint rangeMax, GLint precision);
 
     GLint m_rangeMin;
     GLint m_rangeMax;
     GLint m_precision;
 };
 
 }
 
 #endif // WebGLShaderPrecisionFormat_h