arc: OnClosedFromAndroid removes notifications as not by_user

ui/arc/notification/arc_notification_item.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ui/arc/notification/arc_notification_item.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/memory/ptr_util.h"
@@ skipping 230 matching lines @@
   // TODO(yoshiki): Remove decoding by passing a bitmap directly from Android.
   base::PostTaskAndReplyWithResult(
       base::WorkerPool::GetTaskRunner(true).get(), FROM_HERE,
       base::Bind(&DecodeImage, data->icon_data.storage()),
       base::Bind(&ArcNotificationItem::OnImageDecoded,
                  weak_ptr_factory_.GetWeakPtr()));
 }
 
 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) {
   if (being_removed_by_manager_) {
     // Closing is caused by the manager, so we don't need to nofify a close
     // event to the manager.
     return;
   }
 
   // Do not touch its any members afterwards, because this instance will be
@@ skipping 64 matching lines @@
 
 void ArcNotificationItem::OnImageDecoded(const SkBitmap& bitmap) {
   DCHECK(thread_checker_.CalledOnValidThread());
 
   gfx::Image image = gfx::Image::CreateFrom1xBitmap(bitmap);
   notification_->set_icon(image);
   AddToMessageCenter();
 }
 
 }  // namespace arc