Deferred image decoding to support animated GIFs

Source/core/platform/graphics/chromium/DeferredImageDecoder.h

Index: Source/core/platform/graphics/chromium/DeferredImageDecoder.h
diff --git a/Source/core/platform/graphics/chromium/DeferredImageDecoder.h b/Source/core/platform/graphics/chromium/DeferredImageDecoder.h
index a20bff7acf5193beccdd01a64d6be2d1e140c080..64d125c5c6e86262648d0f8091e527b91e8b0eab 100644
--- a/Source/core/platform/graphics/chromium/DeferredImageDecoder.h
+++ b/Source/core/platform/graphics/chromium/DeferredImageDecoder.h
@@ -30,7 +30,9 @@
 #include "core/platform/graphics/ImageSource.h"
 #include "core/platform/graphics/IntSize.h"
 #include "core/platform/image-decoders/ImageDecoder.h"
-#include <wtf/Forward.h>
+#include "wtf/Forward.h"
+#include "wtf/OwnPtr.h"
+#include "wtf/Vector.h"
 
 namespace WebCore {
 
@@ -69,7 +71,9 @@ public:
 
 private:
     explicit DeferredImageDecoder(PassOwnPtr<ImageDecoder> actualDecoder);
-    SkBitmap createLazyDecodingBitmap();
+    void prepareLazyDecodedFrames();
+    SkBitmap createLazyDecodingBitmap(size_t index);
+    void activateLazyDecoding();
     void setData(PassRefPtr<SharedBuffer>, bool allDataReceived);
 
     RefPtr<SharedBuffer> m_data;
@@ -78,8 +82,9 @@ private:
 
     IntSize m_size;
     ImageOrientation m_orientation;
+    int m_repetitionCount;
 
-    ImageFrame m_lazyDecodedFrame;
+    Vector<OwnPtr<ImageFrame> > m_lazyDecodedFrames;
     RefPtr<ImageFrameGenerator> m_frameGenerator;
 
     static bool s_enabled;