Converted remoting.Error from an enum to a class

remoting/webapp/crd/js/signal_strategy.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 || {};
 
 /**
@@ skipping 71 matching lines @@
  * @param {remoting.LogToServer} logToServer The LogToServer instance for the
  *     connection.
  */
 remoting.SignalStrategy.prototype.sendConnectionSetupResults =
     function(logToServer) {
 };
 
 /** @return {remoting.SignalStrategy.State} Current state */
 remoting.SignalStrategy.prototype.getState = function() {};
 
-/** @return {remoting.Error} Error when in FAILED state. */
+/** @return {!remoting.Error} Error when in FAILED state. */
 remoting.SignalStrategy.prototype.getError = function() {};
 
 /** @return {string} Current JID when in CONNECTED state. */
 remoting.SignalStrategy.prototype.getJid = function() {};
 
 /** @return {remoting.SignalStrategy.Type} The signal strategy type. */
 remoting.SignalStrategy.prototype.getType = function() {};
 
 /**
  * Creates the appropriate signal strategy for the current environment.
@@ skipping 11 matching lines @@
       console.log('FallbackSignalStrategy progress: ' + progress);
     };
 
     return new remoting.FallbackSignalStrategy(
         new remoting.DnsBlackholeChecker(new remoting.XmppConnection()),
         new remoting.WcsAdapter());
   } else {
     return new remoting.WcsAdapter();
   }
 };