Clean forward declaration in public

public/web/WebFrameClient.h

 /*
  * Copyright (C) 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
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 namespace blink {
 
 class WebApplicationCacheHost;
 class WebApplicationCacheHostClient;
 class WebCachedURLRequest;
 class WebColorChooser;
 class WebColorChooserClient;
 class WebContentDecryptionModule;
 class WebCookieJar;
 class WebDataSource;
-class WebDOMEvent;
 class WebExternalPopupMenu;
 class WebExternalPopupMenuClient;
 class WebFormElement;
 class WebGeolocationClient;
 class WebMediaPlayer;
 class WebMediaPlayerClient;
 class WebMIDIClient;
 class WebNotificationPermissionCallback;
 class WebServiceWorkerProvider;
-class WebServiceWorkerProviderClient;
 class WebSocketHandle;
-class WebNode;
 class WebPlugin;
 class WebPluginPlaceholder;
 class WebPushClient;
 class WebRTCPeerConnectionHandler;
 class WebScreenOrientationClient;
-class WebSharedWorker;
-class WebSharedWorkerClient;
 class WebSpeechRecognizer;
 class WebString;
 class WebURL;
-class WebURLLoader;
 class WebURLResponse;
 class WebUserMediaClient;
 class WebWorkerPermissionClientProxy;
 struct WebColorSuggestion;
 struct WebConsoleMessage;
 struct WebContextMenuData;
 struct WebPluginParams;
 struct WebPopupMenuInfo;
 struct WebRect;
-struct WebSize;
 struct WebTransitionElementData;
 struct WebURLError;
 
 class WebFrameClient {
 public:
     // Factory methods -----------------------------------------------------
 
     // May return null.
     virtual WebPluginPlaceholder* createPluginPlaceholder(WebLocalFrame*, const WebPluginParams&) { return 0; }
 
@@ skipping 490 matching lines @@
     // Access the embedder API for speech recognition services.
     virtual WebSpeechRecognizer* speechRecognizer() { return 0; }
 
 protected:
     virtual ~WebFrameClient() { }
 };
 
 } // namespace blink
 
 #endif