Make platform/image-decoders to use USING_FAST_MALLOC.

third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h

 /*
  * Copyright (C) 2010 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:
  *
  * 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 17 matching lines @@
 
 #ifndef WEBPImageDecoder_h
 #define WEBPImageDecoder_h
 
 #include "platform/image-decoders/ImageDecoder.h"
 #include "webp/decode.h"
 #include "webp/demux.h"
 
 namespace blink {
 
-class PLATFORM_EXPORT WEBPImageDecoder : public ImageDecoder {
+class PLATFORM_EXPORT WEBPImageDecoder final : public ImageDecoder {
     WTF_MAKE_NONCOPYABLE(WEBPImageDecoder);
 public:
     WEBPImageDecoder(AlphaOption, GammaAndColorProfileOption, size_t maxDecodedBytes);
     ~WEBPImageDecoder() override;
 
     // ImageDecoder:
     String filenameExtension() const override { return "webp"; }
     bool hasColorProfile() const override { return m_hasColorProfile; }
     void onSetData(SharedBuffer* data) override;
     int repetitionCount() const override;
@@ skipping 39 matching lines @@
     typedef void (*AlphaBlendFunction)(ImageFrame&, ImageFrame&, int, int, int);
     AlphaBlendFunction m_blendFunction;
 
     void clear();
     void clearDecoder();
 };
 
 } // namespace blink
 
 #endif