Get rid of ipc_sender.h include in ipc_message.h.

content/public/browser/resource_dispatcher_host_delegate.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 #define CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "content/common/content_export.h"
-#include "ipc/ipc_message.h"
 #include "webkit/glue/resource_type.h"
 
 class GURL;
 template <class T> class ScopedVector;
 
 namespace appcache {
 class AppCacheService;
 }
 
 namespace content {
 class ResourceContext;
 class ResourceThrottle;
 struct Referrer;
 struct ResourceResponse;
 }
 
+namespace IPC {
+class Sender;
+}
+
 namespace net {
 class AuthChallengeInfo;
 class SSLCertRequestInfo;
 class URLRequest;
 }
 
 namespace content {
 
 class ResourceDispatcherHostLoginDelegate;
 
@@ skipping 83 matching lines @@
       ResourceResponse* response);
 
  protected:
   ResourceDispatcherHostDelegate();
   virtual ~ResourceDispatcherHostDelegate();
 };
 
 }  // namespace content
 
 #endif  // CONTENT_PUBLIC_BROWSER_RESOURCE_DISPATCHER_HOST_DELEGATE_H_