Don't cache any SkBitmaps in DeferredImageDecoder

Source/platform/image-decoders/ImageFrame.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2009-2010. 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 126 matching lines @@
     bool requiredPreviousFrameIndexValid() const { return m_requiredPreviousFrameIndexValid; }
 #endif
     void setHasAlpha(bool alpha);
     void setOriginalFrameRect(const IntRect& r) { m_originalFrameRect = r; }
     void setStatus(Status);
     void setDuration(unsigned duration) { m_duration = duration; }
     void setDisposalMethod(DisposalMethod disposalMethod) { m_disposalMethod = disposalMethod; }
     void setAlphaBlendSource(AlphaBlendSource alphaBlendSource) { m_alphaBlendSource = alphaBlendSource; }
     void setPremultiplyAlpha(bool premultiplyAlpha) { m_premultiplyAlpha = premultiplyAlpha; }
     void setMemoryAllocator(SkBitmap::Allocator* allocator) { m_allocator = allocator; }
-    void setSkBitmap(const SkBitmap& bitmap) { m_bitmap = bitmap; }
     // The pixelsChanged flag needs to be set when the raw pixel data was directly modified
     // (e.g. through a pointer or setRGBA). The flag is usually set after a batch of changes was made.
     void setPixelsChanged(bool pixelsChanged) { m_pixelsChanged = pixelsChanged; }
 
     void setRequiredPreviousFrameIndex(size_t previousFrameIndex)
     {
         m_requiredPreviousFrameIndex = previousFrameIndex;
 #if ENABLE(ASSERT)
         m_requiredPreviousFrameIndexValid = true;
 #endif
@@ skipping 75 matching lines @@
     // be read for image formats that do not have multiple frames.
     size_t m_requiredPreviousFrameIndex;
 #if ENABLE(ASSERT)
     bool m_requiredPreviousFrameIndexValid;
 #endif
 };
 
 } // namespace blink
 
 #endif