Reenabled ChromeOS system setting for timezone selection....

chrome/common/notification_type.h

 // Copyright (c) 2010 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.
 
 #ifndef CHROME_COMMON_NOTIFICATION_TYPE_H_
 #define CHROME_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 1069 matching lines @@
     // TODO(oshima): Port this to all platforms.
     NETWORK_STATE_CHANGED,
 
     // Sent when an attempt to acquire the public key of the owner of a chromium
     // os device has succeeded.
     OWNER_KEY_FETCH_ATTEMPT_SUCCEEDED,
 
     // Sent when an attempt to acquire the public key of the owner of a chromium
     // os device has failed.
     OWNER_KEY_FETCH_ATTEMPT_FAILED,
+
+    // This is sent to a ChromeOS settings observer when a system setting is
+    // changed. The source is the CrosSettings and the details a std::string of
+    // the changed setting.
+    SYSTEM_SETTING_CHANGED,
 #endif
 
     // Sent before the repost form warning is brought up.
     // The source is a NavigationController.
     REPOST_WARNING_SHOWN,
 
 #if defined(TOOLKIT_VIEWS)
     // Sent when a bookmark's context menu is shown. Used to notify
     // tests that the context menu has been created and shown.
     BOOKMARK_CONTEXT_MENU_SHOWN,
@@ skipping 43 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CHROME_COMMON_NOTIFICATION_TYPE_H_