Improve handling of NONE transport in channel configuration.

remoting/protocol/session_config.h

Index: remoting/protocol/session_config.h
diff --git a/remoting/protocol/session_config.h b/remoting/protocol/session_config.h
index 58d3d78ca89b3aa980bfc207977bc39923b4eb93..5d89d67c50f0db1e107bceefd02b893f704ee6a5 100644
--- a/remoting/protocol/session_config.h
+++ b/remoting/protocol/session_config.h
@@ -36,15 +36,17 @@ struct ChannelConfig {
     CODEC_SPEEX,
   };
 
+  // The constructor that creates a config with transport field set to
+  // TRANSPORT_NONE which indicates that corresponding channel is disabled.
   ChannelConfig();
+
+  // Creates a channel config with the specified parameters.
   ChannelConfig(TransportType transport, int version, Codec codec);
 
   // operator== is overloaded so that std::find() works with
   // std::vector<ChannelConfig>.
   bool operator==(const ChannelConfig& b) const;
 
-  void Reset();
-
   TransportType transport;
   int version;
   Codec codec;