Oilpan: keep ImageData on the heap by default.

Source/core/html/ImageData.h

 /*
  * Copyright (C) 2008, 2009 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
@@ skipping 16 matching lines @@
  */
 
 #ifndef ImageData_h
 #define ImageData_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/CoreExport.h"
 #include "core/dom/DOMTypedArray.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/heap/Handle.h"
-#include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class ExceptionState;
 
-class CORE_EXPORT ImageData final : public RefCountedWillBeGarbageCollectedFinalized<ImageData>, public ScriptWrappable {
+class CORE_EXPORT ImageData final : public GarbageCollectedFinalized<ImageData>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static PassRefPtrWillBeRawPtr<ImageData> create(const IntSize&);
-    static PassRefPtrWillBeRawPtr<ImageData> create(const IntSize&, PassRefPtr<DOMUint8ClampedArray>);
-    static PassRefPtrWillBeRawPtr<ImageData> create(unsigned width, unsigned height, ExceptionState&);
-    static PassRefPtrWillBeRawPtr<ImageData> create(DOMUint8ClampedArray*, unsigned width, ExceptionState&);
-    static PassRefPtrWillBeRawPtr<ImageData> create(DOMUint8ClampedArray*, unsigned width, unsigned height, ExceptionState&);
+    static ImageData* create(const IntSize&);
+    static ImageData* create(const IntSize&, PassRefPtr<DOMUint8ClampedArray>);
+    static ImageData* create(unsigned width, unsigned height, ExceptionState&);
+    static ImageData* create(DOMUint8ClampedArray*, unsigned width, ExceptionState&);
+    static ImageData* create(DOMUint8ClampedArray*, unsigned width, unsigned height, ExceptionState&);
 
     IntSize size() const { return m_size; }
     int width() const { return m_size.width(); }
     int height() const { return m_size.height(); }
     const DOMUint8ClampedArray* data() const { return m_data.get(); }
     DOMUint8ClampedArray* data() { return m_data.get(); }
 
     DEFINE_INLINE_TRACE() { }
 
+    void dispose();
+
     virtual v8::Local<v8::Object> associateWithWrapper(v8::Isolate*, const WrapperTypeInfo*, v8::Local<v8::Object> wrapper) override;
 
 private:
     explicit ImageData(const IntSize&);
     ImageData(const IntSize&, PassRefPtr<DOMUint8ClampedArray>);
 
     static bool validateConstructorArguments(DOMUint8ClampedArray*, unsigned width, unsigned&, ExceptionState&);
 
     IntSize m_size;
     RefPtr<DOMUint8ClampedArray> m_data;
 };
 
 } // namespace blink
 
 #endif // ImageData_h