Keep track of accessibility focus across windows.

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

 // Copyright 2015 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 Handles automation from a desktop automation node.
  */
 
 goog.provide('DesktopAutomationHandler');
 
@@ skipping 31 matching lines @@
   // The focused state gets set on the containing webView node.
   var webView = node.find({role: RoleType.webView, state: {focused: true}});
   if (webView) {
     var root = webView.find({role: RoleType.rootWebArea});
     if (root) {
       this.onLoadComplete(
           {target: root,
            type: chrome.automation.EventType.loadComplete});
     }
   }
+
+  chrome.automation.getFocus((function(focus) {
+    if (focus)
+      this.onFocus({target: focus, type: 'focus'});
+  }).bind(this));
 };
 
 DesktopAutomationHandler.prototype = {
   __proto__: BaseAutomationHandler.prototype,
 
   /** @override */
   willHandleEvent_: function(evt) {
     return !cvox.ChromeVox.isActive;
   },
 
@@ skipping 228 matching lines @@
   if (cvox.ChromeVox.isMac)
     return;
   chrome.automation.getDesktop(function(desktop) {
     global.desktopAutomationHandler = new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope