remoting: Cleanup class/struct fwd declarations

remoting/host/client_session.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 REMOTING_HOST_CLIENT_SESSION_H_
 #define REMOTING_HOST_CLIENT_SESSION_H_
 
 #include <cstdint>
 #include <memory>
 #include <string>
@@ skipping 16 matching lines @@
 #include "remoting/protocol/connection_to_client.h"
 #include "remoting/protocol/host_stub.h"
 #include "remoting/protocol/input_event_tracker.h"
 #include "remoting/protocol/input_filter.h"
 #include "remoting/protocol/input_stub.h"
 #include "remoting/protocol/mouse_input_filter.h"
 #include "remoting/protocol/pairing_registry.h"
 #include "remoting/protocol/video_stream.h"
 #include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
 
-namespace base {
-class SingleThreadTaskRunner;
-}  // namespace base
-
 namespace remoting {
 
 class AudioStream;
 class DesktopEnvironment;
 class DesktopEnvironmentFactory;
 class InputInjector;
 class MouseShapePump;
 class ScreenControls;
 
 namespace protocol {
@@ skipping 201 matching lines @@
   // Used to disable callbacks to |this| once DisconnectSession() has been
   // called.
   base::WeakPtrFactory<ClientSessionControl> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientSession);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CLIENT_SESSION_H_