Close all writers before JingleSession is destroyed.

remoting/protocol/client_control_sender.h

 // 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.
 
 // Implementation of ClientStub using sockets created from jingle connection.
 // It sends messages through the socket after serializing it.
 //
 // Object of this class can only be created by ConnectionToClient.
 //
 // This class can be used on any thread.
 
 #ifndef REMOTING_PROTOCOL_CLIENT_STUB_IMPL_H_
 #define REMOTING_PROTOCOL_CLIENT_STUB_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/memory/ref_counted.h"
 #include "remoting/protocol/client_stub.h"
 
 class Task;
 
 namespace net {
 class Socket;
 }  // namespace net
 
 namespace remoting {
 namespace protocol {
 
 class BufferedSocketWriter;
 
+// Implementation of ClientStub that sends commands on a socket. Must
+// be created and closed on the network thread, but can be used on any
+// other thread.
 class ClientControlSender : public ClientStub {
  public:
-  // Create a stub using a socket.
   explicit ClientControlSender(net::Socket* socket);
   virtual ~ClientControlSender();
 
   virtual void NotifyResolution(const NotifyResolutionRequest* msg,
                                 Task* done);
   virtual void BeginSessionResponse(const LocalLoginStatus* msg,
                                     Task* done);
 
+  // Stop writing. Must be called on the network thread when the
+  // underlying socket is being destroyed.
+  void Close();
+
  private:
   // Buffered socket writer holds the serialized message and send it on the
   // right thread.
   scoped_refptr<BufferedSocketWriter> buffered_writer_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientControlSender);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CLIENT_STUB_IMPL_H_