Convert //ash from scoped_ptr to std::unique_ptr

ash/system/tray/system_tray_delegate.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_TRAY_SYSTEM_TRAY_DELEGATE_H_
 #define ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_
 
+#include <memory>
 #include <string>
 #include <vector>
 
 #include "ash/ash_export.h"
 #include "ash/system/user/login_status.h"
 #include "ash/volume_control_delegate.h"
 #include "base/callback_forward.h"
 #include "base/files/file_path.h"
 #include "base/i18n/time_formatting.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/strings/string16.h"
 #include "ui/gfx/image/image_skia.h"
 
 class AccountId;
 
 namespace base {
 class TimeDelta;
 class TimeTicks;
 }
 
@@ skipping 260 matching lines @@
   virtual CastConfigDelegate* GetCastConfigDelegate();
 
   // Returns NetworkingConfigDelegate. May return nullptr.
   virtual NetworkingConfigDelegate* GetNetworkingConfigDelegate() const;
 
   // Returns VolumeControlDelegate. May return nullptr.
   virtual VolumeControlDelegate* GetVolumeControlDelegate() const;
 
   // Sets the VolumeControlDelegate.
   virtual void SetVolumeControlDelegate(
-      scoped_ptr<VolumeControlDelegate> delegate);
+      std::unique_ptr<VolumeControlDelegate> delegate);
 
   // Retrieves the session start time. Returns |false| if the time is not set.
   virtual bool GetSessionStartTime(base::TimeTicks* session_start_time);
 
   // Retrieves the session length limit. Returns |false| if no limit is set.
   virtual bool GetSessionLengthLimit(base::TimeDelta* session_length_limit);
 
   // Get the system tray menu size in pixels (dependent on the language).
   virtual int GetSystemTrayMenuWidth();
 
@@ skipping 24 matching lines @@
   // asynchronously calls |callback| once a trusted policy becomes available.
   virtual void ShouldRebootOnShutdown(const RebootOnShutdownCallback& callback);
 
   // Returns VPNDelegate. May return nullptr.
   virtual VPNDelegate* GetVPNDelegate() const;
 };
 
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_SYSTEM_TRAY_DELEGATE_H_