High CPU and increased memory usage fix for high-res (GIF, WEBP...) animations.

third_party/WebKit/Source/platform/graphics/DeferredImageDecoder.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 23 matching lines @@
 #include "wtf/Forward.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/Vector.h"
 
 class SkImage;
 
 namespace blink {
 
 class ImageFrameGenerator;
 class SharedBuffer;
-struct FrameData;
+struct DeferredFrameData;
 
 class PLATFORM_EXPORT DeferredImageDecoder final {
     WTF_MAKE_NONCOPYABLE(DeferredImageDecoder);
     USING_FAST_MALLOC(DeferredImageDecoder);
 public:
     static PassOwnPtr<DeferredImageDecoder> create(const SharedBuffer& data, ImageDecoder::AlphaOption, ImageDecoder::GammaAndColorProfileOption);
 
     static PassOwnPtr<DeferredImageDecoder> createForTesting(PassOwnPtr<ImageDecoder>);
 
     ~DeferredImageDecoder();
@@ skipping 23 matching lines @@
 
 private:
     explicit DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder);
 
     friend class DeferredImageDecoderTest;
     ImageFrameGenerator* frameGenerator() { return m_frameGenerator.get(); }
 
     void activateLazyDecoding();
     void prepareLazyDecodedFrames();
 
-    PassRefPtr<SkImage> createFrameImageAtIndex(size_t index, bool knownToBeOpaque) const;
+    PassRefPtr<SkImage> createFrameImageAtIndex(size_t index, bool knownToBeOpaque);
 
     // Copy of the data that is passed in, used by deferred decoding.
     // Allows creating readonly snapshots that may be read in another thread.
     OwnPtr<SkRWBuffer> m_rwBuffer;
     bool m_allDataReceived;
     OwnPtr<ImageDecoder> m_actualDecoder;
 
     String m_filenameExtension;
     IntSize m_size;
     int m_repetitionCount;
     bool m_hasColorProfile;
     bool m_canYUVDecode;
 
-    // Carries only frame state and other information. Does not carry bitmap.
-    Vector<FrameData> m_frameData;
+    // Caches frame state information.
+    Vector<DeferredFrameData> m_frameData;
     RefPtr<ImageFrameGenerator> m_frameGenerator;
 
     static bool s_enabled;
 };
 
 } // namespace blink
 
 #endif