Make platform/graphics to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/graphics/ImageSource.h

 /*
  * Copyright (C) 2004, 2005, 2006 Apple Computer, 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 24 matching lines @@
 class SkImage;
 
 namespace blink {
 
 class DeferredImageDecoder;
 class ImageOrientation;
 class IntPoint;
 class IntSize;
 class SharedBuffer;
 
-class PLATFORM_EXPORT ImageSource {
+class PLATFORM_EXPORT ImageSource final {
+    USING_FAST_MALLOC(ImageSource);
     WTF_MAKE_NONCOPYABLE(ImageSource);
 public:
     ImageSource();
     ~ImageSource();
 
     // Tells the ImageSource that the Image no longer cares about decoded frame
     // data except for the specified frame. Callers may pass WTF::kNotFound to
     // clear all frames.
     //
     // In response, the ImageSource should delete cached decoded data for other
@@ skipping 37 matching lines @@
     // frame has not yet begun to decode.
     size_t frameBytesAtIndex(size_t) const;
 
 private:
     OwnPtr<DeferredImageDecoder> m_decoder;
 };
 
 } // namespace blink
 
 #endif