Reland again "Decode GIF image frames on demand".

Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp

Index: Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp
diff --git a/Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp b/Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp
index b8ac85bfdd934a28a3e3e4fb643372943f3b9002..0752f42c57c28e585da5928d13a8485585166055 100644
--- a/Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp
+++ b/Source/WebKit/chromium/tests/ImageLayerChromiumTest.cpp
@@ -37,8 +37,8 @@ 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 {
@@ -60,22 +60,22 @@ public:
         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;
@@ -84,18 +84,16 @@ public:
     }
 
     // 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
     {
     }