Eliminate copies of encoded image data

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.cpp

 /*
  * Copyright (C) 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 @@
 GIFImageDecoder::GIFImageDecoder(AlphaOption alphaOption, GammaAndColorProfileOption colorOptions, size_t maxDecodedBytes)
     : ImageDecoder(alphaOption, colorOptions, maxDecodedBytes)
     , m_repetitionCount(cAnimationLoopOnce)
 {
 }
 
 GIFImageDecoder::~GIFImageDecoder()
 {
 }
 
-void GIFImageDecoder::onSetData(SharedBuffer* data)
+void GIFImageDecoder::onSetData(SegmentReader* data)
 {
     if (m_reader)
         m_reader->setData(data);
 }
 
 int GIFImageDecoder::repetitionCount() const
 {
     // This value can arrive at any point in the image data stream.  Most GIFs
     // in the wild declare it near the beginning of the file, so it usually is
     // set by the time we've decoded the size, but (depending on the GIF and the
@@ skipping 312 matching lines @@
 
     // Update our status to be partially complete.
     buffer->setStatus(ImageFrame::FramePartial);
 
     // Reset the alpha pixel tracker for this frame.
     m_currentBufferSawAlpha = false;
     return true;
 }
 
 } // namespace blink