Refactoring animation code in accelerated path.

Source/core/rendering/RenderLayerBacking.h

Index: Source/core/rendering/RenderLayerBacking.h
diff --git a/Source/core/rendering/RenderLayerBacking.h b/Source/core/rendering/RenderLayerBacking.h
index 6285afd8461769980fc025035ed4b5e5c0454369..516d58b498ce48087e5469c798a3d34865c9dfc3 100644
--- a/Source/core/rendering/RenderLayerBacking.h
+++ b/Source/core/rendering/RenderLayerBacking.h
@@ -37,6 +37,7 @@ namespace WebCore {
 
 class KeyframeList;
 class RenderLayerCompositor;
+class WebAnimationProvider;
 
 enum CompositingLayerType {
     NormalCompositingLayer, // non-tiled layer with backing store
@@ -247,9 +248,6 @@ private:
 
     void doPaintTask(GraphicsLayerPaintInfo&, GraphicsContext*, const IntRect& clip);
 
-    static CSSPropertyID graphicsLayerToCSSProperty(AnimatedPropertyID);
-    static AnimatedPropertyID cssToGraphicsLayerProperty(CSSPropertyID);
-
     RenderLayer* m_owningLayer;
 
     // The hierarchy of layers that is maintained by the RenderLayerBacking looks like this:
@@ -337,6 +335,8 @@ private:
     OwnPtr<GraphicsLayer> m_layerForVerticalScrollbar;
     OwnPtr<GraphicsLayer> m_layerForScrollCorner;
 
+    OwnPtr<WebAnimationProvider> m_animationProvider;
+
     IntRect m_compositedBounds;
 
     bool m_artificiallyInflatedBounds; // bounds had to be made non-zero to make transform-origin work