MD WebUI: Simplify cr-shared-menu exit animation

ui/webui/resources/cr_elements/cr_shared_menu/cr_shared_menu.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.
 
 /** Same as paper-menu-button's custom easing cubic-bezier param. */
 var SLIDE_CUBIC_BEZIER = 'cubic-bezier(0.3, 0.95, 0.5, 1)';
 
 Polymer({
   is: 'cr-shared-menu',
 
@@ skipping 52 matching lines @@
     },
 
     closeAnimationConfig: {
       type: Object,
       value: function() {
         return [{
           name: 'fade-out-animation',
           timing: {
             duration: 150
           }
-        }, {
-          name: 'paper-menu-shrink-width-animation',
-          timing: {
-            delay: 100,
-            duration: 50,
-            easing: SLIDE_CUBIC_BEZIER
-          }
-        }, {
-          name: 'paper-menu-shrink-height-animation',
-          timing: {
-            delay: 200,
-            easing: 'ease-in'
-          }
         }];
       }
     }
   },
 
   keyBindings: {
     'tab': 'onTabPressed_',
   },
 
   listeners: {
@@ skipping 115 matching lines @@
    * Prevent focus restoring when tapping outside the menu. This stops the
    * focus moving around unexpectedly when closing the menu with the mouse.
    * @param {CustomEvent} e
    * @private
    */
   onOverlayCanceled_: function(e) {
     if (e.detail.type == 'tap')
       this.$.dropdown.restoreFocusOnClose = false;
   },
 });