After a supervised user has been imported, close overlays.

chrome/browser/resources/options/managed_user_import.js

 // Copyright 2013 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.
 
 cr.define('options', function() {
   var OptionsPage = options.OptionsPage;
   var ArrayDataModel = cr.ui.ArrayDataModel;
 
   /**
    * ManagedUserImportOverlay class.
@@ skipping 208 matching lines @@
 
     /**
      * Closes the overlay if importing the managed user was successful. Also
      * reset the cached list of managed users in order to get an updated list
      * when the overlay is reopened.
      * @private
      */
     onSuccess_: function() {
       this.updateImportInProgress_(false);
       options.ManagedUserListData.resetPromise();
-      OptionsPage.closeOverlay();
+      OptionsPage.closeAllOverlays();
     },
   };
 
   // Forward public APIs to private implementations.
   [
     'onSuccess',
   ].forEach(function(name) {
     ManagedUserImportOverlay[name] = function() {
       var instance = ManagedUserImportOverlay.getInstance();
       return instance[name + '_'].apply(instance, arguments);
     };
   });
 
   // Export
   return {
     ManagedUserImportOverlay: ManagedUserImportOverlay,
   };
 });