MD History: Fix menu promo not hiding when menu button is clicked

chrome/browser/resources/md_history/app.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('md_history', function() {
   var lazyLoadPromise = null;
   function ensureLazyLoaded() {
     if (!lazyLoadPromise) {
       lazyLoadPromise = new Promise(function(resolve, reject) {
         Polymer.Base.importHref(
@@ skipping 70 matching lines @@
   },
 
   listeners: {
     'cr-toolbar-menu-promo-close': 'onCrToolbarMenuPromoClose_',
     'cr-toolbar-menu-promo-shown': 'onCrToolbarMenuPromoShown_',
     'cr-toolbar-menu-tap': 'onCrToolbarMenuTap_',
     'delete-selected': 'deleteSelected',
     'history-checkbox-select': 'checkboxSelected',
     'history-close-drawer': 'closeDrawer_',
     'history-view-changed': 'historyViewChanged_',
-    'opened-changed': 'onOpenedChanged_',
     'unselect-all': 'unselectAll',
   },
 
   /** @private {?function(!Event)} */
   boundOnCanExecute_: null,
 
   /** @private {?function(!Event)} */
   boundOnCommand_: null,
 
   /** @override */
@@ skipping 49 matching lines @@
   /** @private */
   onCrToolbarMenuPromoShown_: function() {
     md_history.BrowserService.getInstance().menuPromoShown();
   },
 
   /** @private */
   onCrToolbarMenuTap_: function() {
     var drawer = /** @type {!CrDrawerElement} */ (this.$.drawer.get());
     drawer.align = document.documentElement.dir == 'ltr' ? 'left' : 'right';
     drawer.toggle();
+    this.showMenuPromo_ = false;
   },
 
   /**
-   * @param {!CustomEvent} e
-   * @private
-   */
-  onOpenedChanged_: function(e) {
-    if (e.detail.value)
-      this.showMenuPromo_ = false;
-  },
-
-  /**
    * Listens for history-item being selected or deselected (through checkbox)
    * and changes the view of the top toolbar.
    * @param {{detail: {countAddition: number}}} e
    */
   checkboxSelected: function(e) {
     var toolbar = /** @type {HistoryToolbarElement} */ (this.$.toolbar);
     toolbar.count = /** @type {HistoryListElement} */ (this.$.history)
                         .getSelectedItemCount();
   },
 
@@ skipping 171 matching lines @@
       default:
         histogramValue = HistoryPageViewHistogram.HISTORY;
         break;
     }
 
     md_history.BrowserService.getInstance().recordHistogram(
         'History.HistoryPageView', histogramValue,
         HistoryPageViewHistogram.END);
   },
 });