Eliminate copies of encoded image data

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h

Index: third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h
index 617237748daf1301c826d29adf29d76c067e70cd..bfa98974ed8578b43821d4738abbdb4a9cf0657f 100644
--- a/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h
+++ b/third_party/WebKit/Source/platform/image-decoders/gif/GIFImageReader.h
@@ -40,7 +40,6 @@
 
 // Define ourselves as the clientPtr.  Mozilla just hacked their C++ callback class into this old C decoder,
 // so we will too.
-#include "platform/SharedBuffer.h"
 #include "platform/image-decoders/FastSharedBufferReader.h"
 #include "platform/image-decoders/gif/GIFImageDecoder.h"
 #include "wtf/Allocator.h"
@@ -299,7 +298,7 @@ public:
     {
     }
 
-    void setData(PassRefPtr<blink::SharedBuffer> data) { m_data = data; }
+    void setData(PassRefPtr<blink::SegmentReader> data) { m_data = data; }
     bool parse(blink::GIFImageDecoder::GIFParseQuery);
     bool decode(size_t frameIndex);
 
@@ -356,7 +355,7 @@ private:
 
     Vector<OwnPtr<GIFFrameContext>> m_frames;
 
-    RefPtr<blink::SharedBuffer> m_data;
+    RefPtr<blink::SegmentReader> m_data;
     bool m_parseCompleted;
 };