Refactor HistoryService to not send NOTIFICATION_FAVICON_CHANGED

chrome/browser/sync/sessions/notification_service_sessions_router.h

 // Copyright 2014 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_SYNC_SESSIONS_NOTIFICATION_SERVICE_SESSIONS_ROUTER_H_
 #define CHROME_BROWSER_SYNC_SESSIONS_NOTIFICATION_SERVICE_SESSIONS_ROUTER_H_
 
+#include <set>
+
+#include "base/callback_list.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/sync/sessions/sessions_sync_manager.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 
+class GURL;
+class HistoryService;
 class Profile;
 
 namespace content {
 class WebContents;
 }
 
 namespace browser_sync {
 
 // A SessionsSyncManager::LocalEventRouter that drives session sync via
 // the NotificationService.
@@ skipping 17 matching lines @@
   virtual void Stop() OVERRIDE;
 
  private:
   // Called when the URL visited in |web_contents| was blocked by the
   // SupervisedUserService. We forward this on to our handler_ via the
   // normal OnLocalTabModified, but pass through here via a WeakPtr
   // callback from SupervisedUserService and to extract the tab delegate
   // from WebContents.
   void OnNavigationBlocked(content::WebContents* web_contents);
 
+  // Called when the urls of favicon changed.
+  void OnFaviconChanged(const std::set<GURL>& changed_favicons);
+
   LocalSessionEventHandler* handler_;
   content::NotificationRegistrar registrar_;
   Profile* const profile_;
   syncer::SyncableService::StartSyncFlare flare_;
   base::WeakPtrFactory<NotificationServiceSessionsRouter> weak_ptr_factory_;
 
+  scoped_ptr<base::CallbackList<void(const std::set<GURL>&)>::Subscription>
+      favicon_changed_subscription_;
+
   DISALLOW_COPY_AND_ASSIGN(NotificationServiceSessionsRouter);
 };
 
 }  // namespace browser_sync
 
 #endif  // CHROME_BROWSER_SYNC_SESSIONS_NOTIFICATION_SERVICE_SESSIONS_ROUTER_H_