Clean forward declaration in public

public/platform/WebSocketHandleClient.h

 /*
  * Copyright (C) 2013 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 21 matching lines @@
 #define WebSocketHandleClient_h
 
 #include "WebCommon.h"
 #include "public/platform/WebSocketHandle.h"
 
 namespace blink {
 
 class WebSocketHandshakeRequestInfo;
 class WebSocketHandshakeResponseInfo;
 class WebString;
-class WebURL;
 
 class WebSocketHandleClient {
 public:
     // Called when the handle is opened.
     virtual void didConnect(WebSocketHandle*, bool fail, const WebString& selectedProtocol, const WebString& extensions) = 0;
 
     // Called when the browser starts the opening handshake.
     // This notification can be omitted when the inspector is not active.
     virtual void didStartOpeningHandshake(WebSocketHandle*, const WebSocketHandshakeRequestInfo&) = 0;
 
@@ skipping 20 matching lines @@
     virtual void didReceiveFlowControl(WebSocketHandle*, int64_t quota) = 0;
 
     // Called when the browser receives a Close frame from the remote
     // server. Not called when the renderer initiates the closing handshake.
     virtual void didStartClosingHandshake(WebSocketHandle*) = 0;
 };
 
 } // namespace blink
 
 #endif // WebSocketHandleClient_h