PlatformNotificationService layering cleanup.

chrome/browser/notifications/platform_notification_service_impl.cc

Index: chrome/browser/notifications/platform_notification_service_impl.cc
diff --git a/chrome/browser/notifications/platform_notification_service_impl.cc b/chrome/browser/notifications/platform_notification_service_impl.cc
index 991615386a88bd7f8039048b4bbca2b8032f9d82..a37ee80e492013b5eae06a7598fbb23f3552c971 100644
--- a/chrome/browser/notifications/platform_notification_service_impl.cc
+++ b/chrome/browser/notifications/platform_notification_service_impl.cc
@@ -93,9 +93,8 @@ void OnCloseEventDispatchComplete(
 void OnCloseNonPersistentNotificationProfileLoaded(
     const std::string& notification_id,
     Profile* profile) {
-  PlatformNotificationServiceImpl::GetInstance()
-      ->GetNotificationDisplayService(profile)
-      ->Close(notification_id);
+  NotificationDisplayServiceFactory::GetForProfile(profile)->Close(
+      notification_id);
 }
 
 // Callback to run once the profile has been loaded in order to perform a