Simplify data channel creation logic in WebRTC-based protocol

remoting/protocol/channel_dispatcher_base.cc

 // 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.
 
 #include "remoting/protocol/channel_dispatcher_base.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "remoting/base/compound_buffer.h"
@@ skipping 24 matching lines @@
                                  EventHandler* event_handler) {
   event_handler_ = event_handler;
   OnChannelReady(std::move(message_pipe));
 }
 
 void ChannelDispatcherBase::OnChannelReady(
     std::unique_ptr<MessagePipe> message_pipe) {
   channel_factory_ = nullptr;
   message_pipe_ = std::move(message_pipe);
   message_pipe_->Start(this);
+}
 
+void ChannelDispatcherBase::OnMessagePipeOpen() {
+  DCHECK(!is_connected_);
+  is_connected_ = true;
   event_handler_->OnChannelInitialized(this);
 }
 
 void ChannelDispatcherBase::OnMessageReceived(
     std::unique_ptr<CompoundBuffer> message) {
   OnIncomingMessage(std::move(message));
 }
 
 void ChannelDispatcherBase::OnMessagePipeClosed() {
+  is_connected_ = false;
   event_handler_->OnChannelClosed(this);
 }
 
 }  // namespace protocol
 }  // namespace remoting