Clean forward declaration in public

public/web/WebDevToolsAgent.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 18 matching lines @@
  */
 
 #ifndef WebDevToolsAgent_h
 #define WebDevToolsAgent_h
 
 #include "../platform/WebCommon.h"
 #include "../platform/WebVector.h"
 
 namespace blink {
 
-class WebDevToolsAgentClient;
-class WebDevToolsMessageTransport;
 class WebString;
-class WebURLRequest;
-class WebURLResponse;
-class WebView;
-struct WebDevToolsMessageData;
 struct WebPoint;
-struct WebMemoryUsageInfo;
-struct WebURLError;
 
 class WebDevToolsAgent {
 public:
     virtual ~WebDevToolsAgent() {}
 
     virtual void attach(const WebString& hostId) = 0;
     virtual void reattach(const WebString& hostId, const WebString& savedState) = 0;
     virtual void detach() = 0;
 
     virtual void continueProgram() = 0;
@@ skipping 36 matching lines @@
     // Asynchronously request debugger to pause immediately and run the command.
     BLINK_EXPORT static void interruptAndDispatch(MessageDescriptor*);
     BLINK_EXPORT static bool shouldInterruptForMessage(const WebString&);
     BLINK_EXPORT static void processPendingMessages();
 
 };
 
 } // namespace blink
 
 #endif