Convert //ash from scoped_ptr to std::unique_ptr

ash/display/display_error_observer_chromeos.cc

 // Copyright 2013 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 "ash/display/display_error_observer_chromeos.h"
 
 #include <cinttypes>
+#include <memory>
 #include <utility>
 
 #include "ash/new_window_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/system_notifier.h"
 #include "base/strings/string_number_conversions.h"
 #include "grit/ash_resources.h"
 #include "grit/ash_strings.h"
 #include "ui/base/l10n/l10n_util.h"
 #include "ui/base/resource/resource_bundle.h"
@@ skipping 52 matching lines @@
   // Always remove the notification to make sure the notification appears
   // as a popup in any situation.
   message_center::MessageCenter::Get()->RemoveNotification(
       kDisplayErrorNotificationId, false /* by_user */);
 
   int message_id = (new_state == ui::MULTIPLE_DISPLAY_STATE_DUAL_MIRROR) ?
       IDS_ASH_DISPLAY_FAILURE_ON_MIRRORING :
       IDS_ASH_DISPLAY_FAILURE_ON_NON_MIRRORING;
 
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
-  scoped_ptr<Notification> notification(new Notification(
+  std::unique_ptr<Notification> notification(new Notification(
       message_center::NOTIFICATION_TYPE_SIMPLE, kDisplayErrorNotificationId,
       base::string16(),  // title
       l10n_util::GetStringUTF16(message_id),
       bundle.GetImageNamed(IDR_AURA_NOTIFICATION_DISPLAY),
       base::string16(),  // display_source
       GURL(),
       message_center::NotifierId(message_center::NotifierId::SYSTEM_COMPONENT,
                                  system_notifier::kNotifierDisplayError),
       message_center::RichNotificationData(),
       new DisplayErrorNotificationDelegate));
   message_center::MessageCenter::Get()->AddNotification(
       std::move(notification));
 }
 
 base::string16
 DisplayErrorObserver::GetDisplayErrorNotificationMessageForTest() {
   message_center::NotificationList::Notifications notifications =
       message_center::MessageCenter::Get()->GetVisibleNotifications();
   for (message_center::NotificationList::Notifications::const_iterator iter =
            notifications.begin(); iter != notifications.end(); ++iter) {
     if ((*iter)->id() == kDisplayErrorNotificationId)
       return (*iter)->message();
   }
 
   return base::string16();
 }
 
 }  // namespace ash