Change ARC notification type from SIMPLE to BASE_FORMAT

ui/arc/notification/arc_notification_item.cc

Index: ui/arc/notification/arc_notification_item.cc
diff --git a/ui/arc/notification/arc_notification_item.cc b/ui/arc/notification/arc_notification_item.cc
index 694f41bdde7867f0f7218a3c1484f85e7bc4c4a8..0aed07ca08631d9b96cfc4ebd90de82c27cc3bad 100644
--- a/ui/arc/notification/arc_notification_item.cc
+++ b/ui/arc/notification/arc_notification_item.cc
@@ -105,11 +105,11 @@ void ArcNotificationItem::UpdateWithArcNotificationData(
 
   switch (data.type) {
     case ArcNotificationType::BASIC:
-      type = message_center::NOTIFICATION_TYPE_SIMPLE;
+      type = message_center::NOTIFICATION_TYPE_BASE_FORMAT;
       break;
     case ArcNotificationType::IMAGE:
       // TODO(yoshiki): Implement this types.
-      type = message_center::NOTIFICATION_TYPE_SIMPLE;
+      type = message_center::NOTIFICATION_TYPE_BASE_FORMAT;
       LOG(ERROR) << "Unsupported notification type: image";
       break;
     case ArcNotificationType::PROGRESS: