Remove multi-frame image decoder when the image is completely decoded

Source/platform/graphics/ImageFrameGenerator.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:
  * 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 92 matching lines @@
     // Use the given decoder to decode. If a decoder is not given then try to create one.
     // Returns true if decoding was complete.
     bool decode(size_t index, ImageDecoder**, SkBitmap*);
 
     SkISize m_fullSize;
     ThreadSafeDataTransport m_data;
     bool m_isMultiFrame;
     bool m_decodeFailedAndEmpty;
     Vector<bool> m_hasAlpha;
     int m_decodeCount;
+    Vector<bool> m_frameComplete;
+    size_t m_framesCount;

[Alpha Left Google, 2014/10/31 17:17:49]

I don't think you need this member variable. This is available in ImageDecoder
already.

     OwnPtr<ExternalMemoryAllocator> m_externalAllocator;
 
     OwnPtr<ImageDecoderFactory> m_imageDecoderFactory;
 
     // Prevents multiple decode operations on the same data.
     Mutex m_decodeMutex;
 
     // Protect concurrent access to m_hasAlpha.
     Mutex m_alphaMutex;
 };
 
 } // namespace blink
 
 #endif