Converted remoting.Error from an enum to a class

remoting/webapp/app_remoting/js/app_remoting.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.
 
 /**
  * @fileoverview
  * This class implements the functionality that is specific to application
  * remoting ("AppRemoting" or AR).
  */
 
@@ skipping 173 matching lines @@
     }
   };
 
   /** @param {string} token */
   var getAppHost = function(token) {
     var headers = { 'Authorization': 'OAuth ' + token };
     remoting.xhr.post(
         that.runApplicationUrl(), parseAppHostResponse, '', headers);
   };
 
-  /** @param {remoting.Error} error */
+  /** @param {!remoting.Error} error */
   var onError = function(error) {
     that.handleError(error);
   };
 
   remoting.LoadingWindow.show();
 
   remoting.identity.callWithToken(getAppHost, onError);
 }
 
 /**
@@ skipping 51 matching lines @@
   // Cancel the ping when the connection closes.
   window.clearInterval(this.pingTimerId_);
 
   chrome.app.window.current().close();
 };
 
 /**
  * Called when the current session's connection has failed.
  *
  * @param {remoting.SessionConnector} connector
- * @param {remoting.Error} error
+ * @param {!remoting.Error} error
  * @return {void} Nothing.
  */
 remoting.AppRemoting.prototype.handleConnectionFailed = function(
     connector, error) {
   this.handleError(error);
 };
 
 /**
  * Called when the current session has reached the point where the host has
  * started streaming video frames to the client.
@@ skipping 55 matching lines @@
       this.contextMenu_.updateConnectionRTT(now - then);
       return true;
   }
 
   return false;
 };
 
 /**
  * Called when an error needs to be displayed to the user.
  *
- * @param {remoting.Error} errorTag The error to be localized and displayed.
+ * @param {!remoting.Error} errorTag The error to be localized and displayed.
  * @return {void} Nothing.
  */
 remoting.AppRemoting.prototype.handleError = function(errorTag) {
   console.error('Connection failed: ' + errorTag);
   remoting.LoadingWindow.close();
   remoting.MessageWindow.showErrorMessage(
       chrome.i18n.getMessage(/*i18n-content*/'CONNECTION_FAILED'),
       chrome.i18n.getMessage(/** @type {string} */ (errorTag)));
 };