Eliminate copies of encoded image data

third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h

Index: third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h
index d2d95ab96583455e40a6548e9e1d9838757da68a..bac24fec4fba3236a6517d843072035cb5229dd7 100644
--- a/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h
+++ b/third_party/WebKit/Source/platform/image-decoders/webp/WEBPImageDecoder.h
@@ -30,8 +30,10 @@
 #define WEBPImageDecoder_h
 
 #include "platform/image-decoders/ImageDecoder.h"
+#include "third_party/skia/include/core/SkData.h"
 #include "webp/decode.h"
 #include "webp/demux.h"
+#include "wtf/RefPtr.h"
 
 namespace blink {
 
@@ -44,7 +46,7 @@ public:
     // ImageDecoder:
     String filenameExtension() const override { return "webp"; }
     bool hasColorProfile() const override { return m_hasColorProfile; }
-    void onSetData(SharedBuffer* data) override;
+    void onSetData(SegmentReader* data) override;
     int repetitionCount() const override;
     bool frameIsCompleteAtIndex(size_t) const override;
     float frameDurationAtIndex(size_t) const override;
@@ -90,6 +92,9 @@ private:
 
     void clear();
     void clearDecoder();
+
+    // FIXME: Update libwebp's API so it does not require copying the data on each update.
+    RefPtr<SkData> m_encodedData;
 };
 
 } // namespace blink