[Sketch] Animations: Torpedo the old intrusive animation system.

Source/platform/graphics/GraphicsLayer.h

Index: Source/platform/graphics/GraphicsLayer.h
diff --git a/Source/platform/graphics/GraphicsLayer.h b/Source/platform/graphics/GraphicsLayer.h
index cdd4b3cbda38218fd71db0a64cd6cf7b3a6116a9..8e1a07b0b7bb74427f3c3e13c95f2b29ae6bae27 100644
--- a/Source/platform/graphics/GraphicsLayer.h
+++ b/Source/platform/graphics/GraphicsLayer.h
@@ -82,7 +82,7 @@ typedef Vector<GraphicsLayer*, 64> GraphicsLayerVector;
 // GraphicsLayer is an abstraction for a rendering surface with backing store,
 // which may have associated transformation and animations.
 
-class PLATFORM_EXPORT GraphicsLayer : public GraphicsContextPainter, public WebCompositorAnimationDelegate, public WebLayerScrollClient, public WebLayerClient {
+class PLATFORM_EXPORT GraphicsLayer : public GraphicsContextPainter, public WebLayerScrollClient, public WebLayerClient {
     WTF_MAKE_NONCOPYABLE(GraphicsLayer); WTF_MAKE_FAST_ALLOCATED(GraphicsLayer);
 public:
     static PassOwnPtr<GraphicsLayer> create(GraphicsLayerFactory*, GraphicsLayerClient*);
@@ -204,13 +204,6 @@ public:
     // Set that the position/size of the contents (image or video).
     void setContentsRect(const IntRect&);
 
-    // Return true if the animation is handled by the compositing system. If this returns
-    // false, the animation will be run by AnimationController.
-    // These methods handle both transitions and keyframe animations.
-    bool addAnimation(PassOwnPtr<WebCompositorAnimation>);
-    void pauseAnimation(int animationId, double /*timeOffset*/);
-    void removeAnimation(int animationId);
-
     // Layer contents
     void setContentsToImage(Image*);
     void setContentsToNinePatch(Image*, const IntRect& aperture);
@@ -251,10 +244,6 @@ public:
     // GraphicsContextPainter implementation.
     virtual void paint(GraphicsContext&, const IntRect& clip) override;
 
-    // WebCompositorAnimationDelegate implementation.
-    virtual void notifyAnimationStarted(double monotonicTime, int group) override;
-    virtual void notifyAnimationFinished(double monotonicTime, int group) override;
-
     // WebLayerScrollClient implementation.
     virtual void didScroll() override;