arc: OnClosedFromAndroid removes notifications as not by_user

ui/arc/notification/arc_notification_manager.cc

Index: ui/arc/notification/arc_notification_manager.cc
diff --git a/ui/arc/notification/arc_notification_manager.cc b/ui/arc/notification/arc_notification_manager.cc
index 40f8ea426098a7f0c3a184cece63feb0a6407cbc..6be7253b88273c65baf70abfa80f6e83f32c3bf1 100644
--- a/ui/arc/notification/arc_notification_manager.cc
+++ b/ui/arc/notification/arc_notification_manager.cc
@@ -62,7 +62,7 @@ void ArcNotificationManager::OnInstanceClosed() {
     auto it = items_.begin();
     std::unique_ptr<ArcNotificationItem> item = std::move(it->second);
     items_.erase(it);
-    item->OnClosedFromAndroid(false /* by_user */);
+    item->OnClosedFromAndroid();
   }
   ready_ = false;
 }
@@ -101,7 +101,7 @@ void ArcNotificationManager::OnNotificationRemoved(const mojo::String& key) {
 
   std::unique_ptr<ArcNotificationItem> item = std::move(it->second);
   items_.erase(it);
-  item->OnClosedFromAndroid(true /* by_user */);
+  item->OnClosedFromAndroid();
 }
 
 void ArcNotificationManager::SendNotificationRemovedFromChrome(