file_manager: Make test.util.fakeKeyDown more flexible

chrome/browser/resources/file_manager/js/file_manager.js

 // Copyright (c) 2012 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.
 
 'use strict';
 
 /**
  * This variable is checked in SelectFileDialogExtensionBrowserTest.
  * @type {number}
  */
@@ skipping 1126 matching lines @@
    * Initialize the file list table or grid.
    *
    * @param {cr.ui.List} list The list.
    * @private
    */
   FileManager.prototype.initList_ = function(list) {
     // Overriding the default role 'list' to 'listbox' for better accessibility
     // on ChromeOS.
     list.setAttribute('role', 'listbox');
     list.addEventListener('click', this.onDetailClick_.bind(this));
+    list.id = 'file-list';
   };
 
   /**
    * @private
    */
   FileManager.prototype.onCopyProgress_ = function(event) {
     if (event.reason === 'ERROR' &&
         event.error.reason === 'FILESYSTEM_ERROR' &&
         event.error.data.toDrive &&
         event.error.data.code == FileError.QUOTA_EXCEEDED_ERR) {
@@ skipping 2371 matching lines @@
    * Set the flag expressing whether the ctrl key is pressed or not.
    * @param {boolean} flag New value of the flag
    * @private
    */
   FileManager.prototype.setCtrlKeyPressed_ = function(flag) {
     this.ctrlKeyPressed_ = flag;
     this.document_.querySelector('#drive-clear-local-cache').canExecuteChange();
     this.document_.querySelector('#drive-reload').canExecuteChange();
   };
 })();