Converted remoting.Error from an enum to a class

remoting/webapp/base/js/auth_init.js

 // Copyright 2014 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 || {};
 
 /**
  * Get the user's email address and full name.
  *
  * @param {function(string,string):void} onUserInfoAvailable Callback invoked
  *     when the user's email address and full name are available.
  * @return {void} Nothing.
  */
 remoting.initIdentity = function(onUserInfoAvailable) {
 
-  /** @param {remoting.Error} error */
+  /** @param {!remoting.Error} error */
   function onGetIdentityInfoError(error) {
     // No need to show the error message for NOT_AUTHENTICATED
     // because we will show "auth-dialog".
-    if (error != remoting.Error.NOT_AUTHENTICATED) {
+    if (error.tag != remoting.Error.Tag.NOT_AUTHENTICATED) {
       remoting.showErrorMessage(error);
     }
   }
 
   if (base.isAppsV2()) {
     remoting.identity =
         new remoting.Identity(remoting.AuthDialog.getInstance());
   } else {
     // TODO(garykac) Remove this and replace with identity.
     remoting.oauth2 = new remoting.OAuth2();
     var oauth2 = /** @type {*} */ (remoting.oauth2);
     remoting.identity = /** @type {remoting.Identity} */ (oauth2);
     if (!remoting.identity.isAuthenticated()) {
       remoting.AuthDialog.getInstance().show().then(function() {
         remoting.oauth2.doAuthRedirect(function(){
           window.location.reload();
         });
       });
     }
   }
 
   remoting.identity.getUserInfo().then(function(userInfo) {
     onUserInfoAvailable(userInfo.email, userInfo.name);
   }).catch(function(error) {
     onGetIdentityInfoError(
-        /** @type {remoting.Error} */ (error));
+        /** @type {!remoting.Error} */ (error));
   });
 };
 
 /**
  * Removes the cached token and restarts the app.
  *
  * @return {void}  Nothing.
  */
 remoting.handleAuthFailureAndRelaunch = function() {
   remoting.identity.removeCachedAuthToken().then(function(){
     if (base.isAppsV2()) {
       base.Ipc.invoke('remoting.ActivationHandler.restart',
                       chrome.app.window.current().id);
     } else {
       window.location.reload();
     }
   });
-};
+};