Expand Chrome OS ARC support to create one tree source per package

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 33 matching lines @@
   this.lastValueChanged_ = new Date(0);
 
   this.addListener_(EventType.ACTIVEDESCENDANTCHANGED,
                     this.onActiveDescendantChanged);
   this.addListener_(EventType.ALERT,
                     this.onAlert);
   this.addListener_(EventType.ARIA_ATTRIBUTE_CHANGED,
                     this.onAriaAttributeChanged);
   this.addListener_(EventType.AUTOCORRECTION_OCCURED,
                     this.onEventIfInRange);
+  this.addListener_(EventType.BLUR,
+                    this.onBlur);
   this.addListener_(EventType.CHECKED_STATE_CHANGED,
                     this.onCheckedStateChanged);
   this.addListener_(EventType.CHILDREN_CHANGED,
                     this.onChildrenChanged);
   this.addListener_(EventType.EXPANDED_CHANGED,
                     this.onEventIfInRange);
   this.addListener_(EventType.FOCUS,
                     this.onFocus);
   this.addListener_(EventType.HOVER,
                     this.onHover);
@@ skipping 172 matching lines @@
   onAlert: function(evt) {
     var node = evt.target;
     if (!node || !this.shouldOutput_(evt))
       return;
 
     var range = cursors.Range.fromNode(node);
 
     new Output().withSpeechAndBraille(range, null, evt.type).go();
   },
 
+  onBlur: function(evt) {
+    // Nullify focus if it no longer exists.
+    chrome.automation.getFocus(function(focus) {
+      if (!focus)
+        ChromeVoxState.instance.setCurrentRange(null);
+    });
+  },
+
   /**
    * Provides all feedback once a checked state changed event fires.
    * @param {!AutomationEvent} evt
    */
   onCheckedStateChanged: function(evt) {
     if (!AutomationPredicate.checkable(evt.target))
       return;
 
     Output.forceModeForNextSpeechUtterance(cvox.QueueMode.CATEGORY_FLUSH);
     var event = new CustomAutomationEvent(
@@ skipping 305 matching lines @@
 DesktopAutomationHandler.init_ = function() {
   chrome.automation.getDesktop(function(desktop) {
     ChromeVoxState.desktopAutomationHandler =
         new DesktopAutomationHandler(desktop);
   });
 };
 
 DesktopAutomationHandler.init_();
 
 });  // goog.scope