Componentize PrefSyncableService and support classes.

chrome/browser/notifications/extension_welcome_notification.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_NOTIFICATIONS_EXTENSION_WELCOME_NOTIFICATION_H_
 #define CHROME_BROWSER_NOTIFICATIONS_EXTENSION_WELCOME_NOTIFICATION_H_
 
 #include <string>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/prefs/pref_member.h"
 #include "base/timer/timer.h"
-#include "chrome/browser/prefs/pref_service_syncable_observer.h"
 #include "components/keyed_service/core/keyed_service.h"
+#include "components/syncable_prefs/pref_service_syncable_observer.h"
 #include "ui/message_center/notifier_settings.h"
 
 namespace base {
 typedef Callback<void(void)> Closure;
 }
 
 namespace message_center {
 class MessageCenter;
 }
 
@@ skipping 130 matching lines @@
       expiration_timer_;
 
   // Delegate for Chrome global calls like base::Time::GetTime() for
   // testability.
   scoped_ptr<Delegate> delegate_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionWelcomeNotification);
 };
 
 #endif  // CHROME_BROWSER_NOTIFICATIONS_EXTENSION_WELCOME_NOTIFICATION_H_