Compile chrome://settings, part 8: the final battle

chrome/browser/resources/options/chromeos/onc_data.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 ONC Data support class. Wraps a dictionary object containing
  * ONC managed or unmanaged dictionaries. Supports nested dictionaries,
  * e.g. data.getManagedProperty('VPN.Type').
  */
 
 cr.exportPath('cr.onc');
 
 /**
- * @typedef {(Object|Array|string|undefined)}
+ * @typedef {(Object|Array|string|number|undefined)}
  */
 cr.onc.OncValue;
 
 cr.define('cr.onc', function() {
   'use strict';
 
   /**
    * @constructor
    */
   function OncData(data) {
@@ skipping 122 matching lines @@
 
     /**
      * Returns the Source of this configuration. If undefined returns 'None'.
      * @return {string} The configuration source: 'None', 'User', 'Device',
      *                  'UserPolicy', or 'DevicePolicy'.
      */
     getSource: function() {
       var source = this.getActiveValue('Source');
       if (source == undefined)
         return 'None';
+      assert(typeof source == 'string');
       return source;
     },
 
     /**
      * Returns the WiFi security type (defaults to 'None').
      * @return {string} The security type.
      */
     getWiFiSecurity: function() {
       var security = this.getActiveValue('WiFi.Security');
       if (security == undefined)
         return 'None';
+      assert(typeof security == 'string');
       return security;
     },
 
     /**
      * Updates the properties of |data_| from the properties in |update|.
      * Note: this only looks at top level entries, so if a dictionary is
      * updated the entire dictionary is written over. TODO(stevenjb):
      * eliminate this function when |data_| contains only ONC entries and
      * any updates consist of complete ONC dictionaries.
      * @param {Object} update Dictionary containing the updated properties.
@@ skipping 18 matching lines @@
           return property[effective];
       }
       return undefined;
     }
   };
 
   return {
     OncData: OncData
   };
 });