Add keyboard explorer improvements for braille

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.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.
 
 /**
  * @fileoverview An item in a drop-down menu in the ChromeVox panel.
  */
 
 goog.provide('PanelMenuItem');
 
 /**
  * @param {string} menuItemTitle The title of the menu item.
  * @param {string} menuItemShortcut The keystrokes to select this item.
+ * @param {string} menuItemBraille The braille keystrokes to select this item.
  * @param {Function} callback The function to call if this item is selected.
  * @constructor
  */
-PanelMenuItem = function(menuItemTitle, menuItemShortcut, callback) {
+PanelMenuItem = function(
+    menuItemTitle, menuItemShortcut, menuItemBraille, callback) {
   this.callback = callback;
 
   this.element = document.createElement('tr');
   this.element.className = 'menu-item';
   this.element.tabIndex = -1;
   this.element.setAttribute('role', 'menuitem');
 
   this.element.addEventListener('mouseover', (function(evt) {
     this.element.focus();
   }).bind(this), false);
 
   var title = document.createElement('td');
   title.className = 'menu-item-title';
   title.textContent = menuItemTitle;
   this.element.appendChild(title);
 
   var shortcut = document.createElement('td');
   shortcut.className = 'menu-item-shortcut';
   shortcut.textContent = menuItemShortcut;
   this.element.appendChild(shortcut);
+
+  if (localStorage['brailleCaptions'] === String(true)) {
+    var braille = document.createElement('td');
+    braille.className = 'menu-item-shortcut';
+    braille.textContent = menuItemBraille;
+    this.element.appendChild(braille);
+  }
 };
 
 PanelMenuItem.prototype = {
   get text() {
     return this.element.textContent;
   }
 };