Convert //ash from scoped_ptr to std::unique_ptr

ash/system/chromeos/session/tray_session_length_limit.cc

 // Copyright 2014 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/system/chromeos/session/tray_session_length_limit.h"
 
 #include <algorithm>
+#include <memory>
 #include <utility>
 
 #include "ash/shell.h"
 #include "ash/system/chromeos/label_tray_view.h"
 #include "ash/system/system_notifier.h"
 #include "ash/system/tray/system_tray.h"
 #include "ash/system/tray/system_tray_delegate.h"
 #include "ash/system/tray/system_tray_notifier.h"
 #include "base/logging.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 123 matching lines @@
   // For LIMIT_NONE, there's nothing more to do.
   if (limit_state_ == LIMIT_NONE) {
     last_limit_state_ = limit_state_;
     return;
   }
 
   ui::ResourceBundle& bundle = ui::ResourceBundle::GetSharedInstance();
   message_center::RichNotificationData data;
   data.should_make_spoken_feedback_for_popup_updates =
       (limit_state_ != last_limit_state_);
-  scoped_ptr<message_center::Notification> notification(
+  std::unique_ptr<message_center::Notification> notification(
       new message_center::Notification(
           message_center::NOTIFICATION_TYPE_SIMPLE, kNotificationId,
           base::string16() /* title */,
           ComposeNotificationMessage() /* message */,
           bundle.GetImageNamed(
               IDR_AURA_UBER_TRAY_NOTIFICATION_SESSION_LENGTH_LIMIT),
           base::string16() /* display_source */, GURL(),
           message_center::NotifierId(
               message_center::NotifierId::SYSTEM_COMPONENT,
               system_notifier::kNotifierSessionLengthTimeout),
@@ skipping 29 matching lines @@
 base::string16 TraySessionLengthLimit::ComposeTrayBubbleMessage() const {
   return l10n_util::GetStringFUTF16(
       IDS_ASH_STATUS_TRAY_BUBBLE_SESSION_LENGTH_LIMIT,
       ui::TimeFormat::Detailed(ui::TimeFormat::FORMAT_DURATION,
                                ui::TimeFormat::LENGTH_LONG,
                                10,
                                remaining_session_time_));
 }
 
 }  // namespace ash