Send screen on and off state as a11y alert

chrome/browser/ui/ash/chrome_shell_delegate.cc

 // 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 "chrome/browser/ui/ash/chrome_shell_delegate.h"
 
 #include <stddef.h>
 
 #include <limits>
 
@@ skipping 272 matching lines @@
     Profile* profile = ProfileManager::GetActiveUserProfile();
     if (profile) {
       int msg = 0;
       switch (alert) {
         case ash::A11Y_ALERT_CAPS_ON:
           msg = IDS_A11Y_ALERT_CAPS_ON;
           break;
         case ash::A11Y_ALERT_CAPS_OFF:
           msg = IDS_A11Y_ALERT_CAPS_OFF;
           break;
+        case ash::A11Y_ALERT_SCREEN_ON:
+          msg = IDS_A11Y_ALERT_SCREEN_ON;
+          break;
+        case ash::A11Y_ALERT_SCREEN_OFF:
+          msg = IDS_A11Y_ALERT_SCREEN_OFF;
+          break;
         case ash::A11Y_ALERT_WINDOW_NEEDED:
           msg = IDS_A11Y_ALERT_WINDOW_NEEDED;
           break;
         case ash::A11Y_ALERT_WINDOW_OVERVIEW_MODE_ENTERED:
           msg = IDS_A11Y_ALERT_WINDOW_OVERVIEW_MODE_ENTERED;
           break;
         case ash::A11Y_ALERT_NONE:
           msg = 0;
           break;
       }
@@ skipping 265 matching lines @@
       NOTREACHED() << "Unexpected notification " << type;
   }
 }
 
 void ChromeShellDelegate::PlatformInit() {
   registrar_.Add(this, chrome::NOTIFICATION_LOGIN_USER_PROFILE_PREPARED,
                  content::NotificationService::AllSources());
   registrar_.Add(this, chrome::NOTIFICATION_SESSION_STARTED,
                  content::NotificationService::AllSources());
 }