Make keyboard overlay speak when ChromeVox is active

chrome/browser/resources/keyboard_overlay.js

 // Copyright (c) 2011 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.
 
 var BASE_KEYBOARD = {
   top: 0,
   left: 0,
   width: 1237,
   height: 514
 };
@@ skipping 301 matching lines @@
 
 /**
  * A callback function for onkeydown and onkeyup events.
  */
 function handleKeyEvent(e){
   var modifiers = getModifiers(e);
   if (!getKeyboardOverlayId()) {
     return;
   }
   update(modifiers);
+  KeyboardOverlayAccessibilityHelper.maybeSpeakAllshortcuts(modifiers);
 }
 
 /**
  * Initializes the layout of the keys.
  */
 function initLayout() {
   // Add data for the caps lock key
   var keys = getKeyboardGlyphData().keys;
   if (!('3A' in keys)) {
     keys['3A'] = {label: 'caps lock', format: 'left'};
@@ skipping 121 matching lines @@
     keyboardOverlayId = 'en_US';
   }
   while(document.body.firstChild) {
     document.body.removeChild(document.body.firstChild);
   }
   initLayout();
   update([]);
 }
 
 document.addEventListener('DOMContentLoaded', init);