Fix thread usage in chromoting host

remoting/host/client_connection.h

 // Copyright (c) 2010 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.
 
 #ifndef REMOTING_HOST_CLIENT_CONNECTION_H_
 #define REMOTING_HOST_CLIENT_CONNECTION_H_
 
 #include <deque>
 #include <vector>
 
@@ skipping 72 matching lines @@
 
   // Notifies the viewer the update stream has ended.
   virtual void SendEndUpdateStreamMessage();
 
   // Gets the number of update stream messages not yet transmitted.
   // Note that the value returned is an estimate using average size of the
   // most recent update streams.
   // TODO(hclam): Report this number accurately.
   virtual int GetPendingUpdateStreamMessages();
 
-  // Disconnect the remote viewer.
+  // Disconnect the client connection. This method is allowed to be called
+  // more than once and calls after the first one will be ignored.
+  //
+  // After this method is called all the send method calls will be ignored.
   virtual void Disconnect();
 
   /////////////////////////////////////////////////////////////////////////////
   // JingleChannel::Callback implmentations
   virtual void OnStateChange(JingleChannel* channel,
                              JingleChannel::State state);
   virtual void OnPacketReceived(JingleChannel* channel,
                                 scoped_refptr<media::DataBuffer> data);
 
  protected:
@@ skipping 28 matching lines @@
 
   // Event handler for handling events sent from this object.
   EventHandler* handler_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientConnection);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_CLIENT_CONNECTION_H_