Introduce ability to register callback with GoogleURLTracker

chrome/browser/search_engines/template_url_service.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_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 #define CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_
 
 #include <list>
 #include <map>
 #include <set>
@@ skipping 310 matching lines @@
   // Also sets the out param to indicate whether the keyword belongs to an
   // Omnibox extension.
   base::string16 GetKeywordShortName(const base::string16& keyword,
                                      bool* is_omnibox_api_extension_keyword);
 
   // content::NotificationObserver implementation.
   virtual void Observe(int type,
                        const content::NotificationSource& source,
                        const content::NotificationDetails& details) OVERRIDE;
 
+  // Callback that is called when the Google URL is updated.
+  void OnGoogleURLUpdated(GURL old_url, GURL new_url);
+
   // KeyedService implementation.
   virtual void Shutdown() OVERRIDE;
 
   // syncer::SyncableService implementation.
 
   // Returns all syncable TemplateURLs from this model as SyncData. This should
   // include every search engine and no Extension keywords.
   virtual syncer::SyncDataList GetAllSyncData(
       syncer::ModelType type) const OVERRIDE;
   // Process new search engine changes from Sync, merging them into our local
@@ skipping 424 matching lines @@
   // We set this value to increasingly specific values when we know what is the
   // cause/origin of a default search change.
   DefaultSearchChangeOrigin dsp_change_origin_;
 
   // Stores a list of callbacks to be run after TemplateURLService has loaded.
   base::CallbackList<void(void)> on_loaded_callbacks_;
 
   // Helper class to manage the default search engine.
   DefaultSearchManager default_search_manager_;
 
+  scoped_ptr<base::CallbackList<void(GURL, GURL)>::Subscription>
+      google_url_updated_subscription_;
+
   // Used to disable the prepopulated search engines in tests.
   static bool g_fallback_search_engines_disabled;
 
   DISALLOW_COPY_AND_ASSIGN(TemplateURLService);
 };
 
 #endif  // CHROME_BROWSER_SEARCH_ENGINES_TEMPLATE_URL_SERVICE_H_