Fix the keyboard overlay not working.

chrome/browser/resources/chromeos/keyboard_overlay.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.
 
 <include src="keyboard_overlay_data.js"/>
 <include src="keyboard_overlay_accessibility_helper.js"/>
 
 var BASE_KEYBOARD = {
   top: 0,
   left: 0,
@@ skipping 327 matching lines @@
     if (keyTextValue) {
        keyText.style.visibility = 'visible';
     } else {
        keyText.style.visibility = 'hidden';
     }
     keyText.textContent = keyTextValue;
 
     var shortcutText = $(shortcutTextId(identifier, i));
     if (shortcutId) {
       shortcutText.style.visibility = 'visible';
-      shortcutText.textContent = loadTimeData.getString('shortcutId');
+      shortcutText.textContent = loadTimeData.getString(shortcutId);
     } else {
       shortcutText.style.visibility = 'hidden';
     }
 
     if (keyData.format) {
       var format = keyData.format;
       if (format == 'left' || format == 'right') {
         shortcutText.style.textAlign = format;
         keyText.style.textAlign = format;
       }
@@ skipping 172 matching lines @@
  * Handles click events of the learn more link.
  * @param {Event} e Mouse click event.
  */
 function learnMoreClicked(e) {
   chrome.send('openLearnMorePage');
   chrome.send('DialogClose');
   e.preventDefault();
 }
 
 document.addEventListener('DOMContentLoaded', init);