Convert //ash from scoped_ptr to std::unique_ptr

ash/ash_touch_exploration_manager_chromeos.h

 // 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.
 
 #ifndef ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
 #define ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_
 
+#include <memory>
+
 #include "ash/ash_export.h"
 #include "ash/system/tray_accessibility.h"
 #include "base/macros.h"
 #include "ui/chromeos/touch_exploration_controller.h"
 
 namespace chromeos {
 class CrasAudioHandler;
 }
 
 namespace ash {
@@ skipping 20 matching lines @@
   void SilenceSpokenFeedback() override;
   void PlayVolumeAdjustEarcon() override;
   void PlayPassthroughEarcon() override;
   void PlayExitScreenEarcon() override;
   void PlayEnterScreenEarcon() override;
 
  private:
   void UpdateTouchExplorationState();
   bool VolumeAdjustSoundEnabled();
 
-  scoped_ptr<ui::TouchExplorationController> touch_exploration_controller_;
+  std::unique_ptr<ui::TouchExplorationController> touch_exploration_controller_;
   RootWindowController* root_window_controller_;
   chromeos::CrasAudioHandler* audio_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(AshTouchExplorationManager);
 };
 
 }  // namespace ash
 
 #endif  // ASH_TOUCH_EXPLORATION_MANAGER_CHROMEOS_H_