MD History: hide tooltip promo when drawer is swiped open

ui/webui/resources/cr_elements/cr_toolbar/cr_toolbar.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.
 
 Polymer({
   is: 'cr-toolbar',
 
   properties: {
     // Name to display in the toolbar, in titlecase.
     pageName: String,
@@ skipping 46 matching lines @@
     'possiblyShowMenuPromo_(showMenu, showMenuPromo, showingSearch_)',
   ],
 
   /** @return {!CrToolbarSearchFieldElement} */
   getSearchField: function() {
     return this.$.search;
   },
 
   /** @private */
   onClosePromoTap_: function() {
-    this.showMenuPromo = false;
+    this.fire('cr-toolbar-menu-promo-close');
   },
 
   /** @private */
   onMenuTap_: function() {
-    this.fire('cr-menu-tap');
-    this.onClosePromoTap_();
+    this.fire('cr-toolbar-menu-tap');
   },
 
   /** @private */
   possiblyShowMenuPromo_: function() {
     Polymer.RenderStatus.afterNextRender(this, function() {
       if (this.showMenu && this.showMenuPromo && !this.showingSearch_) {
         this.$$('#menuPromo').animate({
           opacity: [0, .9],
         }, /** @type {!KeyframeEffectOptions} */({
           duration: 500,
           fill: 'forwards'
         }));
-        this.fire('cr-menu-promo-shown');
+        this.fire('cr-toolbar-menu-promo-shown');
       }
     }.bind(this));
   },
 
   /**
    * @param {string} title
    * @param {boolean} showMenuPromo
    * @return {string} The title if the menu promo isn't showing, else "".
    */
   titleIfNotShowMenuPromo_: function(title, showMenuPromo) {
     return showMenuPromo ? '' : title;
   },
 });