Add CancelChannelCreation() in protocol::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"
 #include "remoting/proto/video.pb.h"
 #include "remoting/protocol/rtp_writer.h"
 #include "remoting/protocol/session.h"
 #include "remoting/protocol/util.h"
 
 namespace remoting {
 namespace protocol {
 
 ProtobufVideoWriter::ProtobufVideoWriter(base::MessageLoopProxy* message_loop)
-    : buffered_writer_(new BufferedSocketWriter(message_loop)) {
+    : session_(NULL),
+      buffered_writer_(new BufferedSocketWriter(message_loop)) {
 }
 
-ProtobufVideoWriter::~ProtobufVideoWriter() { }
+ProtobufVideoWriter::~ProtobufVideoWriter() {
+  Close();
+}
 
 void ProtobufVideoWriter::Init(protocol::Session* session,
                                const InitializedCallback& callback) {
+  session_ = session;
   initialized_callback_ = callback;
 
-  session->CreateStreamChannel(
+  session_->CreateStreamChannel(
       kVideoChannelName,
       base::Bind(&ProtobufVideoWriter::OnChannelReady, base::Unretained(this)));
 }
 
 void ProtobufVideoWriter::OnChannelReady(net::StreamSocket* socket) {
   if (!socket) {
     initialized_callback_.Run(false);
     return;
   }
 
   DCHECK(!channel_.get());
   channel_.reset(socket);
   // TODO(sergeyu): Provide WriteFailedCallback for the buffered writer.
   buffered_writer_->Init(socket, BufferedSocketWriter::WriteFailedCallback());
 
   initialized_callback_.Run(true);
 }
 
 void ProtobufVideoWriter::Close() {
   buffered_writer_->Close();
   channel_.reset();
+  if (session_) {
+    session_->CancelChannelCreation(kVideoChannelName);
+    session_ = 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