Convert //ash from scoped_ptr to std::unique_ptr

ash/system/chromeos/network/tray_network.h

 // Copyright (c) 2012 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.
 
 #ifndef ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H
 #define ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H
 
+#include <memory>
 #include <set>
 
 #include "ash/system/chromeos/network/network_observer.h"
 #include "ash/system/chromeos/network/network_portal_detector_observer.h"
 #include "ash/system/chromeos/network/tray_network_state_observer.h"
 #include "ash/system/tray/system_tray_item.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/time/time.h"
 
 namespace chromeos {
 class NetworkState;
 }
 
 namespace ash {
 namespace tray {
 class NetworkDefaultView;
 class NetworkDetailedView;
@@ skipping 27 matching lines @@
   void OnCaptivePortalDetected(const std::string& service_path) override;
 
   // TrayNetworkStateObserver::Delegate
   void NetworkStateChanged() override;
 
  private:
   tray::NetworkTrayView* tray_;
   tray::NetworkDefaultView* default_;
   tray::NetworkDetailedView* detailed_;
   bool request_wifi_view_;
-  scoped_ptr<TrayNetworkStateObserver> network_state_observer_;
+  std::unique_ptr<TrayNetworkStateObserver> network_state_observer_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayNetwork);
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_CHROMEOS_NETWORK_TRAY_NETWORK_H