blimp: Cleanup class/struct forward declarations

blimp/client/app/session/blimp_client_session.h

 // Copyright 2015 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 BLIMP_CLIENT_APP_SESSION_BLIMP_CLIENT_SESSION_H_
 #define BLIMP_CLIENT_APP_SESSION_BLIMP_CLIENT_SESSION_H_
 
 #include <memory>
 #include <string>
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/weak_ptr.h"
 #include "base/threading/thread.h"
 #include "blimp/client/core/compositor/blob_image_serialization_processor.h"
 #include "blimp/client/core/session/assignment_source.h"
 #include "blimp/client/core/session/network_event_observer.h"
 #include "blimp/client/public/session/assignment.h"
 #include "blimp/common/proto/blimp_message.pb.h"
 #include "blimp/net/blimp_message_processor.h"
 
-namespace net {
-class IPEndPoint;
-}
-
 namespace blimp {
 
-class BlimpMessageProcessor;
-class BlimpMessageThreadPipe;
 class BlobChannelReceiver;
-class BrowserConnectionHandler;
-class ClientConnectionManager;
 class HeliumBlobReceiverDelegate;
 class ThreadPipeManager;
 
 namespace client {
 
 class ClientNetworkComponents;
 class GeolocationFeature;
 class NavigationFeature;
 class ImeFeature;
 class RenderWidgetFeature;
@@ skipping 81 matching lines @@
 
   base::WeakPtrFactory<BlimpClientSession> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BlimpClientSession);
 };
 
 }  // namespace client
 }  // namespace blimp
 
 #endif  // BLIMP_CLIENT_APP_SESSION_BLIMP_CLIENT_SESSION_H_