Fixed callWithToken error handling.

remoting/webapp/wcs.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.
  */
 
 /**
  * @fileoverview
  * A class that provides an interface to a WCS connection.
  */
 
@@ skipping 43 matching lines @@
 
   /** @type {remoting.Wcs} */
   var that = this;
   /**
    * A timer that polls for an updated access token.
    * @type {number}
    * @private
    */
   this.pollForUpdatedToken_ = setInterval(
       function() {
-        /** @param {string} token */
+        /** @param {string?} token */
         var updateAccessToken = function(token) {
-          that.updateAccessToken_(token);
+          if (token) {
+            that.updateAccessToken_(token);
+          } else {
+            console.error('pollForUpdatedToken: Authentication failed.');
+            // No need to update the token. The hanging GET will fail anyway.
+          }
         }
         remoting.oauth2.callWithToken(updateAccessToken);
       },
       60 * 1000);
 
   /**
    * A function called when an IQ stanza is received.
    * @param {string} stanza The IQ stanza.
    * @private
    */
@@ skipping 62 matching lines @@
 /**
  * Sets the function called when an IQ stanza is received.
  *
  * @param {function(string): void} onIq The function called when an IQ stanza
  *     is received.
  * @return {void} Nothing.
  */
 remoting.Wcs.prototype.setOnIq = function(onIq) {
   this.onIq_ = onIq;
 };