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 c9916718cd7b0f0f1f30fb34e0f13b43845e47ee..718ae30f13feb2f3015b47376261f817f1562f86 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 {
 
@@ -43,7 +45,7 @@ public:
 
     // ImageDecoder:
     String filenameExtension() const override { return "webp"; }
-    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;
@@ -83,6 +85,9 @@ private:
 
     void clear();
     void clearDecoder();
+
+    // FIXME: Update libwebp's API so it does not require copying the data on each update.
+    RefPtr<SkData> m_consolidatedData;
 };
 
 } // namespace blink