Don't recreate SkImages for high-res (GIF, WEBP...) animations.

third_party/WebKit/Source/platform/graphics/ImageLayerChromiumTest.cpp

 /*
  * Copyright (C) 2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 45 matching lines @@
     IntSize size() const override
     {
         return m_size;
     }
 
     PassRefPtr<SkImage> imageForCurrentFrame() override
     {
         return m_image;
     }
 
-    void destroyDecodedData(bool) override
+    void destroyDecodedData() override
     {
         // Image pure virtual stub.
     }
 
     void draw(SkCanvas*, const SkPaint&, const FloatRect&, const FloatRect&, RespectImageOrientationEnum, ImageClampingMode) override
     {
         // Image pure virtual stub.
     }
 
 private:
@@ skipping 65 matching lines @@
     ASSERT_FALSE(graphicsLayer->contentsLayer());
 
     graphicsLayer->setContentsToImage(opaqueImage.get());
     ASSERT_TRUE(graphicsLayer->contentsLayer()->opaque());
 
     graphicsLayer->setContentsToImage(nonOpaqueImage.get());
     ASSERT_FALSE(graphicsLayer->contentsLayer()->opaque());
 }
 
 } // namespace blink