Define a minimum time for double tap in ChromeVox.

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

 // Copyright 2016 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 Provides notification support for ChromeVox.
  */
 
 goog.provide('Notifications');
 
@@ skipping 56 matching lines @@
 /**
  * Set after an update is shown.
  * @type {UpdateNotification}
  */
 Notifications.currentUpdate;
 
 /**
  * Runs notifications that should be shown for startup.
  */
 Notifications.onStartup = function() {
-  return;
   // Only run on background page.
   if (document.location.href.indexOf('background.html') == -1)
     return;
 
   Notifications.reset();
   Notifications.currentUpdate = new UpdateNotification();
   Notifications.currentUpdate.show();
 };
 
 /**
  * Runs notifications that should be shown for mode changes.
  */
 Notifications.onModeChange = function() {
-  return;
   // Only run on background page.
   if (document.location.href.indexOf('background.html') == -1)
     return;
 
   if (ChromeVoxState.instance.mode !== ChromeVoxMode.FORCE_NEXT)
     return;
 
   Notifications.reset();
   Notifications.currentUpdate = new UpdateNotification();
   Notifications.currentUpdate.show();
 };
 
 /**
  * Resets to a clean state. Future events will trigger update notifications.
  */
 Notifications.reset = function() {
   if (Notifications.currentUpdate)
     Notifications.currentUpdate.removeAllListeners();
   delete localStorage['notifications_update_notification_shown'];
 };