Clean forward declaration in public

public/web/WebView.h

 /*
  * Copyright (C) 2009, 2010, 2011, 2012 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 31 matching lines @@
 
 namespace blink {
 
 class WebAXObject;
 class WebAutofillClient;
 class WebCredentialManagerClient;
 class WebDevToolsAgent;
 class WebDevToolsAgentClient;
 class WebDragData;
 class WebFrame;
-class WebFrameClient;
-class WebGraphicsContext3D;
 class WebHitTestResult;
-class WebNode;
 class WebPageOverlay;
 class WebPrerendererClient;
-class WebRange;
 class WebSettings;
 class WebSpellCheckClient;
 class WebString;
 class WebViewClient;
 struct WebActiveWheelFlingParameters;
 struct WebMediaPlayerAction;
 struct WebPluginAction;
 struct WebPoint;
 struct WebFloatPoint;
 struct WebWindowFeatures;
@@ skipping 429 matching lines @@
     // event gets generated/tested.
     virtual void forceNextWebGLContextCreationToFail() = 0;
 
 protected:
     ~WebView() {}
 };
 
 } // namespace blink
 
 #endif