Clean forward declaration in public

public/web/WebViewClient.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 31 matching lines @@
 #include "WebNavigatorContentUtilsClient.h"
 #include "WebPageVisibilityState.h"
 #include "WebPopupType.h"
 #include "WebTextAffinity.h"
 #include "WebTextDirection.h"
 #include "WebWidgetClient.h"
 
 namespace blink {
 
 class WebAXObject;
-class WebCompositorOutputSurface;
 class WebDateTimeChooserCompletion;
 class WebDragData;
-class WebElement;
 class WebFileChooserCompletion;
-class WebGestureEvent;
 class WebHitTestResult;
 class WebImage;
-class WebInputElement;
-class WebKeyboardEvent;
 class WebNode;
-class WebRange;
 class WebSpeechRecognizer;
 class WebStorageNamespace;
 class WebURL;
 class WebURLRequest;
 class WebView;
 class WebWidget;
-struct WebConsoleMessage;
 struct WebDateTimeChooserParams;
 struct WebPoint;
 struct WebPopupMenuInfo;
 struct WebRect;
 struct WebSize;
 struct WebWindowFeatures;
 
 // Since a WebView is a WebWidget, a WebViewClient is a WebWidgetClient.
 // Virtual inheritance allows an implementation of WebWidgetClient to be
 // easily reused as part of an implementation of WebViewClient.
@@ skipping 219 matching lines @@
     // Informs the browser that the draggable regions have been updated.
     virtual void draggableRegionsChanged() { }
 
 protected:
     ~WebViewClient() { }
 };
 
 } // namespace blink
 
 #endif