Send 'key' from fake keyboard events generated by file_manager.

ui/file_manager/integration_tests/file_manager/gear_menu.js

 // Copyright 2015 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';
 
 /**
  * Expected files shown in Downloads with hidden enabled
  *
  * @type {!Array<!TestEntryInfo>}
@@ skipping 206 matching lines @@
   StepsRunner.run([
     function() {
       setupAndWaitUntilReady(null, RootPath.DRIVE).then(this.next);
     },
     function(results) {
       appId = results.windowId;
       remoteCall.waitForElement(appId, '#gear-button').then(this.next);
     },
     // Open the gear meny by a shortcut (Alt-E).
     function() {
-      remoteCall.fakeKeyDown(appId, 'body', 'U+0045', false, false, true)
+      remoteCall.fakeKeyDown(appId, 'body', 'e', 'U+0045', false, false, true)
           .then(this.next);
     },
     // Wait for menu to appear.
     function(result) {
       chrome.test.assertTrue(result);
       remoteCall.waitForElement(appId, '#gear-menu').then(this.next);
     },
     // Wait for menu to appear.
     function(result) {
       remoteCall.waitForElement(appId,
@@ skipping 33 matching lines @@
     function(result) {
       remoteCall.waitForFiles(appId, TestEntryInfo.getExpectedRows(
           BASIC_DRIVE_ENTRY_SET), {ignoreFileSize: true,
           ignoreLastModifiedTime: true}).then(this.next);
     },
     function() {
       checkIfNoErrorsOccured(this.next);
     },
   ]);
 };