Add disable flag around supervised user import code.

chrome/browser/resources/options/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.
 
 var AddLanguageOverlay = options.AddLanguageOverlay;
 var AlertOverlay = options.AlertOverlay;
 var AutofillEditAddressOverlay = options.AutofillEditAddressOverlay;
 var AutofillEditCreditCardOverlay = options.AutofillEditCreditCardOverlay;
 var AutofillOptions = options.AutofillOptions;
 var BrowserOptions = options.BrowserOptions;
@@ skipping 134 matching lines @@
                               BrowserOptions.getInstance());
   OptionsPage.registerOverlay(LanguageOptions.getInstance(),
                               BrowserOptions.getInstance(),
                               [$('language-button'),
                                $('manage-languages')]);
   OptionsPage.registerOverlay(ManageProfileOverlay.getInstance(),
                               BrowserOptions.getInstance());
   if (!cr.isChromeOS) {
     OptionsPage.registerOverlay(ManagedUserCreateConfirmOverlay.getInstance(),
                                 BrowserOptions.getInstance());
-    if (loadTimeData.getBoolean('allowCreateExistingManagedUsers')) {
+    if (!loadTimeData.getBoolean('disableCreateExistingManagedUsers')) {
       OptionsPage.registerOverlay(ManagedUserImportOverlay.getInstance(),
                                   BrowserOptions.getInstance());
     }
     OptionsPage.registerOverlay(ManagedUserLearnMoreOverlay.getInstance(),
                                 CreateProfileOverlay.getInstance());
   }
   OptionsPage.registerOverlay(MediaGalleriesManager.getInstance(),
                               ContentSettings.getInstance(),
                               [$('manage-galleries-button')]);
   OptionsPage.registerOverlay(PasswordManager.getInstance(),
@@ skipping 94 matching lines @@
   options.OptionsPage.willClose();
 };
 
 /**
  * Listener for the |popstate| event.
  * @param {Event} e The |popstate| event.
  */
 window.onpopstate = function(e) {
   options.OptionsPage.setState(e.state);
 };