Reland again "Decode GIF image frames on demand".

Source/WebKit/chromium/tests/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 19 matching lines @@
 #include "core/platform/graphics/skia/NativeImageSkia.h"
 #include "public/platform/WebImageLayer.h"
 #include <wtf/PassOwnPtr.h>
 
 using namespace WebCore;
 
 namespace {
 
 class MockGraphicsLayerClient : public GraphicsLayerClient {
   public:
-    virtual void notifyAnimationStarted(const GraphicsLayer*, double time) { }
-    virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) { }
+    virtual void notifyAnimationStarted(const GraphicsLayer*, double time) OVERRIDE { }
+    virtual void paintContents(const GraphicsLayer*, GraphicsContext&, GraphicsLayerPaintingPhase, const IntRect& inClip) OVERRIDE { }
 };
 
 class TestImage : public Image {
 public:
 
     static PassRefPtr<TestImage> create(const IntSize& size, bool opaque)
     {
         return adoptRef(new TestImage(size, opaque));
     }
 
     explicit TestImage(const IntSize& size, bool opaque)
         : Image(0)
         , m_size(size)
     {
         m_nativeImage = NativeImageSkia::create();
         m_nativeImage->bitmap().setConfig(SkBitmap::kARGB_8888_Config,
                                           size.width(), size.height(), 0);
         m_nativeImage->bitmap().allocPixels();
         m_nativeImage->bitmap().setIsOpaque(opaque);
     }
 
-    virtual bool isBitmapImage() const
+    virtual bool isBitmapImage() const OVERRIDE
     {
         return true;
     }
 
-    virtual bool currentFrameKnownToBeOpaque()
+    virtual bool currentFrameKnownToBeOpaque() OVERRIDE
     {
         return m_nativeImage->bitmap().isOpaque();
     }
 
-    virtual IntSize size() const
+    virtual IntSize size() const OVERRIDE
     {
         return m_size;
     }
 
-    virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame()
+    virtual PassRefPtr<NativeImageSkia> nativeImageForCurrentFrame() OVERRIDE
     {
         if (m_size.isZero())
             return 0;
 
         return m_nativeImage;
     }
 
     // Stub implementations of pure virtual Image functions.
-    virtual void destroyDecodedData(bool)
+    virtual void destroyDecodedData() OVERRIDE
     {
     }
 
-    virtual unsigned decodedSize() const
+    virtual unsigned decodedSize() const OVERRIDE
     {
         return 0u;
     }
 
-    virtual void draw(WebCore::GraphicsContext*, const WebCore::FloatRect&,
-        const WebCore::FloatRect&, WebCore::ColorSpace,
-        WebCore::CompositeOperator, WebCore::BlendMode)
+    virtual void draw(GraphicsContext*, const FloatRect&, const FloatRect&, ColorSpace, CompositeOperator, BlendMode) OVERRIDE
     {
     }
 
 private:
 
     IntSize m_size;
 
     RefPtr<NativeImageSkia> m_nativeImage;
 };
 
@@ skipping 17 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