Remove WebCompositorSupport

sky/engine/public/web/WebWidget.h

 /*
  * Copyright (C) 2009 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 24 matching lines @@
 #include "../platform/WebCommon.h"
 #include "../platform/WebRect.h"
 #include "../platform/WebSize.h"
 #include "sky/engine/public/web/WebBeginFrameArgs.h"
 #include "sky/engine/public/web/WebCompositionUnderline.h"
 #include "sky/engine/public/web/WebTextDirection.h"
 #include "sky/engine/public/web/WebTextInputInfo.h"
 
 namespace blink {
 
-class WebCompositeAndReadbackAsyncCallback;
 class WebInputEvent;
 class WebLayerTreeView;
 class WebString;
 struct WebPoint;
 struct WebRenderingStats;
 template <typename T> class WebVector;
 
 class WebWidget {
 public:
     // This method closes and deletes the WebWidget.
@@ skipping 75 matching lines @@
     // content.
     virtual WebColor backgroundColor() const = 0;
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif  // SKY_ENGINE_PUBLIC_WEB_WEBWIDGET_H_