Fix loadtimedata error message on non-Chrome OS

chrome/browser/resources/options/language_options.js

 // Copyright (c) 2012 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.
 
 // TODO(kochi): Generalize the notification as a component and put it
 // in js/cr/ui/notification.js .
 
 cr.define('options', function() {
   /** @const */ var OptionsPage = options.OptionsPage;
   /** @const */ var LanguageList = options.LanguageList;
@@ skipping 551 matching lines @@
       } else if (languageCode in loadTimeData.getValue('uiLanguageCodeSet')) {
         if (cr.isChromeOS && UIAccountTweaks.loggedInAsGuest()) {
           // In the guest mode for ChromeOS, changing UI language does not make
           // sense because it does not take effect after browser restart.
           uiLanguageButton.hidden = true;
           uiLanguageMessage.hidden = true;
         } else {
           uiLanguageButton.textContent =
               loadTimeData.getString('displayInThisLanguage');
 
-          if (loadTimeData.getBoolean('secondaryUser')) {
+          if (loadTimeData.valueExists('secondaryUser') &&
+              loadTimeData.getBoolean('secondaryUser')) {
             uiLanguageButton.disabled = true;
             uiLanguageIndicator.setAttribute('controlled-by', 'shared');
           } else {
             uiLanguageButton.onclick = function(e) {
               chrome.send('uiLanguageChange', [languageCode]);
             };
           }
           showMutuallyExclusiveNodes(
               [uiLanguageButton, uiLanguageMessage, uiLanguageNotification], 0);
         }
@@ skipping 744 matching lines @@
 
   LanguageOptions.onComponentManagerInitialized = function(componentImes) {
     LanguageOptions.getInstance().appendComponentExtensionIme_(componentImes);
   };
 
   // Export
   return {
     LanguageOptions: LanguageOptions
   };
 });