Fix polymer import issue in options after changes in lock_screen.html

chrome/browser/resources/options/chromeos/quick_unlock_configure_overlay.js

 // Copyright 2016 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 Page = cr.ui.pageManager.Page;
   var PageManager = cr.ui.pageManager.PageManager;
 
   /**
    * QuickUnlockConfigureOverlay class
@@ skipping 48 matching lines @@
 
     /**
      * Called when polymer has been loaded and the dialog should be displayed.
      * @private
      */
     onPolymerLoaded_: function() {
       settings.navigateTo(settings.Route.LOCK_SCREEN);
       var lockScreen = document.querySelector('settings-lock-screen');
 
       var checkbox =
-          lockScreen.root.querySelector('div.settings-box.single-column');
+          lockScreen.root.querySelector('div.settings-box');
       checkbox.hidden = true;
 
       var passwordPrompt = lockScreen.root.
           querySelector('settings-password-prompt-dialog');
       passwordPrompt.addEventListener('close', function() {
         if (!lockScreen.setModes_) {
           QuickUnlockConfigureOverlay.dismiss();
         }
       }.bind(this));
     },
   };
 
   QuickUnlockConfigureOverlay.dismiss = function() {
     PageManager.closeOverlay();
   };
 
   // Export
   return {
     QuickUnlockConfigureOverlay: QuickUnlockConfigureOverlay
   };
 });