Clean forward declaration in public

public/web/WebSharedWorkerConnector.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #ifndef WebSharedWorkerConnector_h
 #define WebSharedWorkerConnector_h
 
 #include "WebContentSecurityPolicy.h"
 
 namespace blink {
 
-class WebString;
 class WebMessagePortChannel;
-class WebURL;
 
 // This is the interface to conncect to SharedWorker.
 // Since SharedWorkers communicate entirely through MessagePorts this interface only contains APIs for starting up a SharedWorker.
 class WebSharedWorkerConnector {
 public:
     virtual ~WebSharedWorkerConnector() { }
 
     class ConnectListener {
     public:
         // Invoked once the connect event has been sent so the caller can free this object.
         virtual void connected() = 0;
         virtual void scriptLoadFailed() = 0;
     };
 
     // Sends a connect event to the SharedWorker context. The listener is invoked when this async operation completes.
     virtual void connect(WebMessagePortChannel*, ConnectListener*) = 0;
 };
 
 } // namespace blink
 
 #endif