Remove WebCompositorSupport

sky/engine/public/platform/Platform.h

Index: sky/engine/public/platform/Platform.h
diff --git a/sky/engine/public/platform/Platform.h b/sky/engine/public/platform/Platform.h
index fd16511cb9573597747e899feae2bd9e84752970..e9a8ee8ccdb577fe2121e978b69f24623c613f3e 100644
--- a/sky/engine/public/platform/Platform.h
+++ b/sky/engine/public/platform/Platform.h
@@ -54,11 +54,9 @@ namespace blink {
 
 class WebBlobRegistry;
 class WebClipboard;
-class WebCompositorSupport;
 class WebConvertableToTraceFormat;
 class WebDiscardableMemory;
 class WebFallbackThemeEngine;
-class WebFlingAnimator;
 class WebGraphicsContext3DProvider;
 class WebSandboxSupport;
 struct WebFloatPoint;
@@ -349,10 +347,6 @@ public:
 
     virtual bool isThreadedCompositingEnabled() { return false; }
 
-    virtual WebCompositorSupport* compositorSupport() { return 0; }
-
-    virtual WebFlingAnimator* createFlingAnimator() { return 0; }
-
 protected:
     virtual ~Platform() { }
 };