When the Google base URL changes and causes keyword updates, save those to the database.

chrome/common/chrome_notification_types.h

 // 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.
 
 #ifndef CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_
 #pragma once
 
 #include "content/public/browser/notification_types.h"
 
@@ skipping 374 matching lines @@
   // AutocompleteController, the details not used.
   NOTIFICATION_AUTOCOMPLETE_CONTROLLER_RESULT_READY,
 
   // This is sent when an item of the Omnibox popup is selected. The source
   // is the profile.
   NOTIFICATION_OMNIBOX_OPENED_URL,
 
   // Sent when the Google URL for a profile has been updated.  Some services
   // cache this value and need to update themselves when it changes.  See
   // google_util::GetGoogleURLAndUpdateIfNecessary().  The source is the
-  // Profile, the details the new (const) GURL.
+  // Profile, the details a GoogleURLTracker::UpdatedDetails containing the old
+  // and new URLs.
   //
   // Note that because incognito mode requests for the GoogleURLTracker are
   // redirected to the non-incognito profile's copy, this notification will only
   // ever fire on non-incognito profiles; thus listeners should use
   // GetOriginalProfile() when constructing a Source to filter against.
   NOTIFICATION_GOOGLE_URL_UPDATED,
 
   // Printing ----------------------------------------------------------------
 
   // Notification from PrintJob that an event occurred. It can be that a page
@@ skipping 710 matching lines @@
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 
 #endif  // CHROME_COMMON_CHROME_NOTIFICATION_TYPES_H_