Update ICE protocol to handle closed channel

remoting/protocol/ice_connection_to_client.cc

 // 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.
 
 #include "remoting/protocol/ice_connection_to_client.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 171 matching lines @@
 
 
 void IceConnectionToClient::OnIceTransportRouteChange(
     const std::string& channel_name,
     const TransportRoute& route) {
   event_handler_->OnRouteChange(channel_name, route);
 }
 
 void IceConnectionToClient::OnIceTransportError(ErrorCode error) {
   DCHECK(thread_checker_.CalledOnValidThread());
-
   Disconnect(error);
 }
 
 void IceConnectionToClient::OnChannelInitialized(
     ChannelDispatcherBase* channel_dispatcher) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   NotifyIfChannelsReady();
 }
 
 void IceConnectionToClient::OnChannelClosed(
     ChannelDispatcherBase* channel_dispatcher) {
-  // ICE transport doesn't close channels dynamically.
-  NOTREACHED();
+  DCHECK(thread_checker_.CalledOnValidThread());
+  Disconnect(OK);
 }
 
 void IceConnectionToClient::NotifyIfChannelsReady() {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   if (!control_dispatcher_ || !control_dispatcher_->is_connected())
     return;
   if (!event_dispatcher_ || !event_dispatcher_->is_connected())
     return;
   if (!video_dispatcher_ || !video_dispatcher_->is_connected())
     return;
   if ((!audio_writer_ || !audio_writer_->is_connected()) &&
       session_->config().is_audio_enabled()) {
     return;
   }
   event_handler_->OnConnectionChannelsConnected();
   event_handler_->CreateMediaStreams();
 }
 
 void IceConnectionToClient::CloseChannels() {
   control_dispatcher_.reset();
   event_dispatcher_.reset();
   video_dispatcher_.reset();
   audio_writer_.reset();
 }
 
 }  // namespace protocol
 }  // namespace remoting