Converted remoting.Error from an enum to a class

remoting/webapp/crd/js/host_list_api.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
  * API for host-list management.
  */
 
 'use strict';
 
 /** @suppress {duplicate} */
 var remoting = remoting || {};
 
 /** @interface */
 remoting.HostListApi = function() {
 };
 
 /**
  * Fetch the list of hosts for a user.
  *
  * @param {function(Array<remoting.Host>):void} onDone
- * @param {function(remoting.Error):void} onError
+ * @param {function(!remoting.Error):void} onError
  */
 remoting.HostListApi.prototype.get = function(onDone, onError) {
 };
 
 /**
  * Update the information for a host.
  *
  * @param {function():void} onDone
- * @param {function(remoting.Error):void} onError
+ * @param {function(!remoting.Error):void} onError
  * @param {string} hostId
  * @param {string} hostName
  * @param {string} hostPublicKey
  */
 remoting.HostListApi.prototype.put =
     function(hostId, hostName, hostPublicKey, onDone, onError) {
 };
 
 /**
  * Delete a host.
  *
  * @param {function():void} onDone
- * @param {function(remoting.Error):void} onError
+ * @param {function(!remoting.Error):void} onError
  * @param {string} hostId
  */
 remoting.HostListApi.prototype.remove = function(hostId, onDone, onError) {
 };