[Webapp Refactor] Reliably cancels a connection.

remoting/webapp/crd/js/client_session.js

Index: remoting/webapp/crd/js/client_session.js
diff --git a/remoting/webapp/crd/js/client_session.js b/remoting/webapp/crd/js/client_session.js
index 6941b420b4a26cb6d61a58fb79fe82ee24c5514c..a51f7a5dd7da3013442122de9aad37d3a71d919a 100644
--- a/remoting/webapp/crd/js/client_session.js
+++ b/remoting/webapp/crd/js/client_session.js
@@ -269,6 +269,8 @@ remoting.ClientSession.prototype.connect = function(host, credentialsProvider) {
  */
 remoting.ClientSession.prototype.disconnect = function(error) {
   if (this.isFinished()) {
+    // Do not send the session-terminate Iq if disconnect() is already called or
+    // if it is initiated by the host.
     return;
   }