arc: OnClosedFromAndroid removes notifications as not by_user

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 52d3a5b89a6bfed3cffdf2bd97135f8953a7ca27..98b5543287bf6a682e126b1ffed35811e63feb95 100644
--- a/ui/arc/notification/arc_notification_item.cc
+++ b/ui/arc/notification/arc_notification_item.cc
@@ -248,9 +248,9 @@ void ArcNotificationItem::UpdateWithArcNotificationData(
 
 ArcNotificationItem::~ArcNotificationItem() {}
 
-void ArcNotificationItem::OnClosedFromAndroid(bool by_user) {
+void ArcNotificationItem::OnClosedFromAndroid() {
   being_removed_by_manager_ = true;  // Closing is initiated by the manager.
-  message_center_->RemoveNotification(notification_id_, by_user);
+  message_center_->RemoveNotification(notification_id_, false /* by_user */);
 }
 
 void ArcNotificationItem::Close(bool by_user) {