Add keyboard explorer improvements for braille

chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js

Index: chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js
diff --git a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js
index ff080afff4f61f0bacd452948c45c9d8f981624c..38ce2e1ba5a6e07a7aea5ed8a461b189b747c73f 100644
--- a/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js
+++ b/chrome/browser/resources/chromeos/chromevox/cvox2/background/panel_menu_item.js
@@ -11,10 +11,12 @@ 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');
@@ -35,6 +37,11 @@ PanelMenuItem = function(menuItemTitle, menuItemShortcut, callback) {
   shortcut.className = 'menu-item-shortcut';
   shortcut.textContent = menuItemShortcut;
   this.element.appendChild(shortcut);
+
+  var braille = document.createElement('td');

[dmazzoni, 2016/11/10 01:22:05]

It's going to get crowded showing all of these. How about we enable it based on
whether braille captions are on?

[David Tseng, 2016/11/10 04:56:58]

Good idea. Done.

+  braille.className = 'menu-item-shortcut';
+  braille.textContent = menuItemBraille;
+  this.element.appendChild(braille);
 };
 
 PanelMenuItem.prototype = {