Cleanup remaining class/struct fwd declarations

google_apis/gcm/engine/connection_factory_impl.h

 // Copyright (c) 2013 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 GOOGLE_APIS_GCM_ENGINE_CONNECTION_FACTORY_IMPL_H_
 #define GOOGLE_APIS_GCM_ENGINE_CONNECTION_FACTORY_IMPL_H_
 
 #include "google_apis/gcm/engine/connection_factory.h"
 
 #include <stddef.h>
@@ skipping 12 matching lines @@
 #include "net/socket/client_socket_handle.h"
 #include "url/gurl.h"
 
 namespace net {
 class HttpNetworkSession;
 class NetLog;
 }
 
 namespace gcm {
 
-class ConnectionHandlerImpl;
 class GCMStatsRecorder;
 
 class GCM_EXPORT ConnectionFactoryImpl :
     public ConnectionFactory,
     public net::NetworkChangeNotifier::NetworkChangeObserver {
  public:
   // |http_network_session| is an optional network session to use as a source
   // for proxy auth credentials (via its HttpAuthCache). |gcm_network_session|
   // is the network session through which GCM connections should be made, and
   // must not be the same as |http_network_session|.
@@ skipping 167 matching lines @@
   ConnectionListener* listener_;
 
   base::WeakPtrFactory<ConnectionFactoryImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ConnectionFactoryImpl);
 };
 
 }  // namespace gcm
 
 #endif  // GOOGLE_APIS_GCM_ENGINE_CONNECTION_FACTORY_IMPL_H_