Move gif image decoder to SkCodec

third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h

Index: third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
diff --git a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
index ea9c01cc0df2a70ca0f9153503aba2c37d9acd7e..ccf76f1fe021bfef1a02ef9a1aa1a5012939f393 100644
--- a/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
+++ b/third_party/WebKit/Source/platform/image-decoders/ImageDecoder.h
@@ -248,15 +248,6 @@ class PLATFORM_EXPORT ImageDecoder {
   // Callers may pass WTF::kNotFound to clear all frames.
   // Note: If |frame_buffer_cache_| contains only one frame, it won't be
   // cleared. Returns the number of bytes of frame data actually cleared.
-  //
-  // This is a virtual method because MockImageDecoder needs to override it in
-  // order to run the test ImageFrameGeneratorTest::ClearMultiFrameDecode.
-  //
-  // @TODO  Let MockImageDecoder override ImageFrame::ClearFrameBuffer instead,
-  //        so this method can be made non-virtual. It is used in the test
-  //        ImageFrameGeneratorTest::ClearMultiFrameDecode. The test needs to
-  //        be modified since two frames may be kept in cache, instead of
-  //        always just one, with this ClearCacheExceptFrame implementation.
   virtual size_t ClearCacheExceptFrame(size_t);
 
   // If the image has a cursor hot-spot, stores it in the argument
@@ -396,7 +387,9 @@ class PLATFORM_EXPORT ImageDecoder {
   // |index| is smaller than |frame_buffer_cache_|.size().
   virtual bool FrameStatusSufficientForSuccessors(size_t index) {
     DCHECK(index < frame_buffer_cache_.size());
-    return frame_buffer_cache_[index].GetStatus() != ImageFrame::kFrameEmpty;
+    ImageFrame::Status frame_status = frame_buffer_cache_[index].GetStatus();
+    return frame_status == ImageFrame::kFramePartial ||
+           frame_status == ImageFrame::kFrameComplete;
   }
 
  private: