Set slide_out_enabled property for CustomNotification

ui/message_center/views/notification_view.cc

Index: ui/message_center/views/notification_view.cc
diff --git a/ui/message_center/views/notification_view.cc b/ui/message_center/views/notification_view.cc
index 746f0822b8bdb8df86ec5df65c49a584c8456275..c7bdce476419936b85bc8b8daeab80f58cf750ec 100644
--- a/ui/message_center/views/notification_view.cc
+++ b/ui/message_center/views/notification_view.cc
@@ -666,8 +666,6 @@ void NotificationView::CreateOrUpdateActionButtonViews(
 
 void NotificationView::CreateOrUpdateCloseButtonView(
     const Notification& notification) {
-  set_slide_out_enabled(!notification.pinned());
-
   if (!notification.pinned() && !close_button_) {
     PaddedButton* close = new PaddedButton(this);
     close->SetPadding(-kCloseIconRightPadding, kCloseIconTopPadding);