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

ui/file_manager/integration_tests/file_manager/file_dialog.js

 // Copyright 2014 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';
 
 /**
  * Tests to open and cancel the file dialog.
  *
  * @param {string} volumeName Volume name passed to the selectVolume remote
@@ skipping 35 matching lines @@
         {type: 'openFile'},
         volumeName,
         expectedSet,
         function(windowId) {
           return remoteCall.callRemoteTestUtil(
               'selectFile', windowId, ['hello.txt']
           ).then(function() {
             return remoteCall.callRemoteTestUtil(
                 'fakeKeyDown',
                 windowId,
-                ['#file-list', 'U+001B', false, false, false]);
+                ['#file-list', 'Escape', 'U+001B', false, false, false]);
           });
         });
   }).then(function(result) {
     // Undefined means the dialog is canceled.
     chrome.test.assertEq(undefined, result);
   });
 
   var closeByOkButtonPromise = closeByEscKeyPromise.then(function() {
     return openAndWaitForClosingDialog(
         {type: 'openFile'},
@@ skipping 33 matching lines @@
   testPromise(remoteCall.waitForWindow('dialog#').then(function(windowId) {
     return remoteCall.callRemoteTestUtil('unload', windowId, []).
         then(function() {
           return remoteCall.callRemoteTestUtil('getErrorCount', windowId, []);
         }).
         then(function(num) {
           chrome.test.assertEq(0, num);
         });
   }));
 };