Clean forward declaration in public

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 27 matching lines @@
 #include "../platform/WebSize.h"
 #include "WebBeginFrameArgs.h"
 #include "WebCompositionUnderline.h"
 #include "WebTextDirection.h"
 #include "WebTextInputInfo.h"
 
 namespace blink {
 
 class WebCompositeAndReadbackAsyncCallback;
 class WebInputEvent;
-class WebLayerTreeView;
-class WebMouseEvent;
 class WebPagePopup;
 class WebString;
-class WebWidgetClient;
 struct WebPoint;
-struct WebRenderingStats;
 template <typename T> class WebVector;
 
 class WebWidget {
 public:
     // This method closes and deletes the WebWidget.
     virtual void close() { }
 
     // Returns the current size of the WebWidget.
     virtual WebSize size() { return WebSize(); }
 
@@ skipping 203 matching lines @@
     // Sets the height subtracted from the Widget to accomodate the top controls.
     virtual void setTopControlsLayoutHeight(float) { }
 
 protected:
     ~WebWidget() { }
 };
 
 } // namespace blink
 
 #endif