Remove event_channel() and control_channel() from Session interface.

remoting/protocol/protobuf_video_writer.cc

 // Copyright (c) 2011 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/protobuf_video_writer.h"
 
 #include "base/bind.h"
 #include "base/task.h"
 #include "net/socket/stream_socket.h"
 #include "remoting/base/constants.h"
@@ skipping 39 matching lines @@
 
 void ProtobufVideoWriter::Close() {
   buffered_writer_->Close();
   channel_.reset();
   if (session_) {
     session_->CancelChannelCreation(kVideoChannelName);
     session_ = NULL;
   }
 }
 
+bool ProtobufVideoWriter::is_connected() {
+  return channel_.get() != NULL;
+}
+
 void ProtobufVideoWriter::ProcessVideoPacket(const VideoPacket* packet,
                                              const base::Closure& done) {
   buffered_writer_->Write(SerializeAndFrameMessage(*packet), done);
 }
 
 int ProtobufVideoWriter::GetPendingPackets() {
   return buffered_writer_->GetBufferChunks();
 }
 
 }  // namespace protocol
 }  // namespace remoting