Add MessageChanneFactory interface and use it in ChannelDispatcherBase.

remoting/protocol/ice_connection_to_host.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_HOST_H_
 #define REMOTING_PROTOCOL_ICE_CONNECTION_TO_HOST_H_
 
 #include <set>
 #include <string>
 
@@ skipping 48 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;
 
   // MonitoredVideoStub::EventHandler interface.
   virtual void OnVideoChannelStatus(bool active);
 
   void NotifyIfChannelsReady();
 
-  void CloseOnError(ErrorCode error);
-
   // Closes the P2P connection.
   void CloseChannels();
 
   void SetState(State state, ErrorCode error);
 
   HostEventCallback* event_callback_ = nullptr;
 
   // Stub for incoming messages.
   ClientStub* client_stub_ = nullptr;
   ClipboardStub* clipboard_stub_ = nullptr;
@@ skipping 16 matching lines @@
   ErrorCode error_ = OK;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(IceConnectionToHost);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_ICE_CONNECTION_TO_HOST_H_