[MD settings] add ripple back to advanced settings menu

chrome/browser/resources/settings/settings_menu/settings_menu.js

 // Copyright 2015 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
  * 'settings-menu' shows a menu with a hardcoded set of pages and subpages.
  */
 Polymer({
   is: 'settings-menu',
@@ skipping 25 matching lines @@
 
     this.$.advancedPage.addEventListener('paper-submenu-close', function() {
       this.fire('toggle-advanced-page', false);
     }.bind(this));
 
     this.fire('toggle-advanced-page',
               settings.Route.ADVANCED.contains(settings.getCurrentRoute()));
   },
 
   /**
-   * @param {!Node} target
+   * @param {!Event} event
    * @private
    */
-  ripple_: function(target) {
+  ripple_: function(event) {
     var ripple = document.createElement('paper-ripple');
     ripple.addEventListener('transitionend', function() {
       ripple.remove();
     });
-    target.appendChild(ripple);
+    event.currentTarget.appendChild(ripple);
     ripple.downAction();
     ripple.upAction();
   },
 
   /**
    * @param {!Event} event
    * @private
    */
   openPage_: function(event) {
-    this.ripple_(/** @type {!Node} */(event.currentTarget));
-
     var route = settings.getRouteForPath(event.currentTarget.dataset.path);
     assert(route, 'settings-menu has an an entry with an invalid path');
     settings.navigateTo(route);
   },
 
   /**
    * @param {boolean} opened Whether the menu is expanded.
    * @return {string} Which icon to use.
    * @private
    * */
   arrowState_: function(opened) {
     return opened ? 'settings:arrow-drop-up' : 'cr:arrow-drop-down';
   },
 });