Propagate connection state from networking layer to UI.

remoting/protocol/session.h

 // 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.
 
 #ifndef REMOTING_PROTOCOL_SESSION_H_
 #define REMOTING_PROTOCOL_SESSION_H_
 
 #include <string>
 
 #include "base/callback.h"
@@ skipping 48 matching lines @@
     // Called after session state has changed. It is safe to destroy
     // the session from within the handler if |state| is CLOSED or
     // FAILED.
     virtual void OnSessionStateChange(State state) = 0;
 
     // Called whenever route for the channel specified with
     // |channel_name| changes. Session must not be destroyed by the
     // handler of this event.
     virtual void OnSessionRouteChange(const std::string& channel_name,
                                       const TransportRoute& route) = 0;
+
+    // Called when ready state on one of the channels changes. See
+    // comments in transport.h for explanation on what this state
+    // means and how it can used.
+    virtual void OnSessionChannelReady(const std::string& channel_name,
+                                       bool ready) {}
   };
 
   // TODO(sergeyu): Specify connection error code when channel
   // connection fails.
   typedef base::Callback<void(scoped_ptr<net::StreamSocket>)>
       StreamChannelCallback;
   typedef base::Callback<void(scoped_ptr<net::Socket>)>
       DatagramChannelCallback;
 
   Session() {}
@@ skipping 46 matching lines @@
   virtual void Close() = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(Session);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_SESSION_H_