ui/file_manager/externs/menu_item_update_event.js

// Copyright 2017 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.

/**
 * @constructor
 * @extends {Event}
 */
var MenuItemUpdateEvent = function() {};

/**
 * @type {!cr.ui.MenuButton}
 */
MenuItemUpdateEvent.prototype.menuButton;