Add MessageChanneFactory interface and use it in ChannelDispatcherBase.

remoting/protocol/ice_connection_to_client.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 REMOTING_PROTOCOL_ICE_CONNECTION_TO_CLIENT_H_
 #define REMOTING_PROTOCOL_ICE_CONNECTION_TO_CLIENT_H_
 
 #include <stdint.h>
 
 #include <string>
@@ skipping 47 matching lines @@
   // Session::EventHandler interface.
   void OnSessionStateChange(Session::State state) override;
 
   // IceTransport::EventHandler interface.
   void OnIceTransportRouteChange(const std::string& channel_name,
                                  const TransportRoute& route) override;
   void OnIceTransportError(ErrorCode error) override;
 
   // ChannelDispatcherBase::EventHandler interface.
   void OnChannelInitialized(ChannelDispatcherBase* channel_dispatcher) override;
-  void OnChannelError(ChannelDispatcherBase* channel_dispatcher,
-                      ErrorCode error) override;
 
  private:
   void NotifyIfChannelsReady();
 
   void CloseChannels();
 
   base::ThreadChecker thread_checker_;
 
   // Event handler for handling events sent from this object.
   ConnectionToClient::EventHandler* event_handler_;
 
   scoped_ptr<Session> session_;
 
   scoped_refptr<base::SingleThreadTaskRunner> video_encode_task_runner_;
 
   IceTransport transport_;
 
   scoped_ptr<HostControlDispatcher> control_dispatcher_;
   scoped_ptr<HostEventDispatcher> event_dispatcher_;
   scoped_ptr<HostVideoDispatcher> video_dispatcher_;
   scoped_ptr<AudioWriter> audio_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(IceConnectionToClient);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_ICE_CONNECTION_TO_CLIENT_H_