Pass error messages from native messaging to web-app.

remoting/webapp/crd/js/host_controller.js

 // 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.
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @constructor */
@@ skipping 38 matching lines @@
   if (!remoting.HostController.State.hasOwnProperty(state)) {
     throw "Invalid HostController.State: " + state;
   }
   return remoting.HostController.State[state];
 }
 
 /** @enum {number} */
 remoting.HostController.AsyncResult = {
   OK: 0,
   FAILED: 1,
-  CANCELLED: 2,
-  FAILED_DIRECTORY: 3
+  CANCELLED: 2
 };
 
 /**
  * @param {string} result The async result name.
  * @return {remoting.HostController.AsyncResult} The result enum value.
  */
 remoting.HostController.AsyncResult.fromString = function(result) {
   if (!remoting.HostController.AsyncResult.hasOwnProperty(result)) {
     throw "Invalid HostController.AsyncResult: " + result;
   }
@@ skipping 421 matching lines @@
     emailPromise.then(function(/** string */ email) {
       signalStrategy.connect(remoting.settings.XMPP_SERVER, email, token);
     });
   });
 
   return result;
 };
 
 /** @type {remoting.HostController} */
 remoting.hostController = null;