Add MessagePipe interface. Use it in ChannelDispatcherBase.

remoting/protocol/webrtc_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/webrtc_connection_to_client.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/location.h"
@@ skipping 131 matching lines @@
 void WebrtcConnectionToClient::OnWebrtcTransportConnecting() {
   control_dispatcher_->Init(transport_.outgoing_channel_factory(), this);
 
   event_dispatcher_->Init(transport_.incoming_channel_factory(), this);
   event_dispatcher_->set_on_input_event_callback(base::Bind(
       &ConnectionToClient::OnInputEventReceived, base::Unretained(this)));
 }
 
 void WebrtcConnectionToClient::OnWebrtcTransportConnected() {
   DCHECK(thread_checker_.CalledOnValidThread());
-  event_handler_->OnConnectionChannelsConnected(this);
 }
 
 void WebrtcConnectionToClient::OnWebrtcTransportError(ErrorCode error) {
   DCHECK(thread_checker_.CalledOnValidThread());
   Disconnect(error);
 }
 
 void WebrtcConnectionToClient::OnWebrtcTransportMediaStreamAdded(
     scoped_refptr<webrtc::MediaStreamInterface> stream) {
   LOG(WARNING) << "The client created an unexpected media stream.";
 }
 
 void WebrtcConnectionToClient::OnWebrtcTransportMediaStreamRemoved(
     scoped_refptr<webrtc::MediaStreamInterface> stream) {}
 
 void WebrtcConnectionToClient::OnChannelInitialized(
     ChannelDispatcherBase* channel_dispatcher) {
   DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (control_dispatcher_ && control_dispatcher_->is_connected() &&

[Sergey Ulanov, 2016/02/02 21:22:48]

This change needs to be in this CL because it fixes an issue that crashes the
host with this change.

+      event_dispatcher_ && event_dispatcher_->is_connected()) {
+    event_handler_->OnConnectionChannelsConnected(this);
+  }
 }
 
 void WebrtcConnectionToClient::OnChannelError(
     ChannelDispatcherBase* channel_dispatcher,
     ErrorCode error) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   LOG(ERROR) << "Failed to connect channel "
              << channel_dispatcher->channel_name();
   Disconnect(error);
 }
 
 }  // namespace protocol
 }  // namespace remoting