Profile shouldn't own DesktopNotificationService.

chrome/browser/content_settings/content_settings_notification_provider.cc

Index: chrome/browser/content_settings/content_settings_notification_provider.cc
diff --git a/chrome/browser/content_settings/content_settings_notification_provider.cc b/chrome/browser/content_settings/content_settings_notification_provider.cc
index 1d81fbe0d1384ef897c7f40c37a1a11c10f57a1d..835bb1445960478e4c5acf7b00ac388de19094d9 100644
--- a/chrome/browser/content_settings/content_settings_notification_provider.cc
+++ b/chrome/browser/content_settings/content_settings_notification_provider.cc
@@ -6,6 +6,7 @@
 #include "chrome/browser/content_settings/content_settings_notification_provider.h"
 
 #include "base/string_util.h"
+#include "chrome/browser/notifications/desktop_notification_service_factory.h"
 #include "chrome/browser/notifications/notification.h"
 #include "chrome/browser/notifications/notifications_prefs_cache.h"
 #include "chrome/browser/notifications/notification_ui_manager.h"
@@ -227,7 +228,7 @@ void NotificationProvider::NotifySettingsChange() {
   NotificationService::current()->Notify(
       NotificationType::DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
       Source<DesktopNotificationService>(
-          profile_->GetDesktopNotificationService()),
+          DesktopNotificationServiceFactory::GetForProfile(profile_)),
       NotificationService::NoDetails());
 }