Convert //chrome/browser/chromeos from scoped_ptr to std::unique_ptr

chrome/browser/chromeos/app_mode/kiosk_app_external_loader.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 CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_EXTERNAL_LOADER_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_EXTERNAL_LOADER_H_
 
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/extensions/external_loader.h"
 
 namespace chromeos {
 
 // A custom extensions::ExternalLoader that is created by KioskAppManager and
 // used for install kiosk app extensions.
 class KioskAppExternalLoader
     : public extensions::ExternalLoader,
       public base::SupportsWeakPtr<KioskAppExternalLoader> {
  public:
   KioskAppExternalLoader();
 
   // Sets current kiosk app extensions to be loaded.
-  void SetCurrentAppExtensions(scoped_ptr<base::DictionaryValue> prefs);
+  void SetCurrentAppExtensions(std::unique_ptr<base::DictionaryValue> prefs);
 
   // extensions::ExternalLoader overrides:
   void StartLoading() override;
 
  private:
   ~KioskAppExternalLoader() override;
 
   DISALLOW_COPY_AND_ASSIGN(KioskAppExternalLoader);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_EXTERNAL_LOADER_H_