Hide the process of instantiating NotificationServiceImpl from embedders.

chrome/browser/sync/glue/typed_url_change_processor.cc

Index: chrome/browser/sync/glue/typed_url_change_processor.cc
diff --git a/chrome/browser/sync/glue/typed_url_change_processor.cc b/chrome/browser/sync/glue/typed_url_change_processor.cc
index 95e4573e5ad1d167ae665c6ab6ac532a9eecdbef..68e00d9843540062d817dea1f7dc7bcc9a9e6a8b 100644
--- a/chrome/browser/sync/glue/typed_url_change_processor.cc
+++ b/chrome/browser/sync/glue/typed_url_change_processor.cc
@@ -18,7 +18,7 @@
 #include "chrome/browser/sync/profile_sync_service.h"
 #include "chrome/browser/sync/protocol/typed_url_specifics.pb.h"
 #include "chrome/common/chrome_notification_types.h"
-#include "content/browser/notification_service_impl.h"
+#include "content/public/browser/notification_service.h"
 
 using content::BrowserThread;
 
@@ -50,7 +50,7 @@ TypedUrlChangeProcessor::TypedUrlChangeProcessor(
   // When running in unit tests, there is already a NotificationService object.
   // Since only one can exist at a time per thread, check first.
   if (!content::NotificationService::current())
-    notification_service_.reset(new NotificationServiceImpl);
+    notification_service_.reset(content::NotificationService::Create());
   StartObserving();
 }