Convert Pass()→std::move() in //ash (CrOS edition)

ash/system/chromeos/power/battery_notification.cc

 // Copyright 2015 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/power/battery_notification.h"
 
 #include "ash/system/chromeos/power/power_status.h"
 #include "ash/system/system_notifier.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 76 matching lines @@
   notification->SetSystemPriority();
   return notification;
 }
 
 }  // namespace
 
 BatteryNotification::BatteryNotification(
     MessageCenter* message_center,
     TrayPower::NotificationState notification_state)
     : message_center_(message_center) {
-  message_center_->AddNotification(
-      CreateNotification(notification_state).Pass());
+  message_center_->AddNotification(CreateNotification(notification_state));
 }
 
 BatteryNotification::~BatteryNotification() {
   if (message_center_->FindVisibleNotificationById(kBatteryNotificationId))
     message_center_->RemoveNotification(kBatteryNotificationId, false);
 }
 
 void BatteryNotification::Update(
     TrayPower::NotificationState notification_state) {
   if (message_center_->FindVisibleNotificationById(kBatteryNotificationId)) {
-    message_center_->UpdateNotification(
-        kBatteryNotificationId, CreateNotification(notification_state).Pass());
+    message_center_->UpdateNotification(kBatteryNotificationId,
+                                        CreateNotification(notification_state));
   }
 }
 
 }  // namespace ash