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

chrome/browser/chromeos/system/timezone_util.h

 // Copyright 2013 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_SYSTEM_TIMEZONE_UTIL_H_
 #define CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_UTIL_H_
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
 
 namespace base {
 class ListValue;
 }
 
 namespace chromeos {
 
 struct TimeZoneResponseData;
 
 namespace system {
 
 // Creates a list of pairs of each timezone's ID and name.
-scoped_ptr<base::ListValue> GetTimezoneList();
+std::unique_ptr<base::ListValue> GetTimezoneList();
 
 // Returns true if device is managed and has SystemTimezonePolicy set.
 bool HasSystemTimezonePolicy();
 
 // Apply TimeZone update from TimeZoneProvider.
 void ApplyTimeZone(const TimeZoneResponseData* timezone);
 
 }  // namespace system
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_SYSTEM_TIMEZONE_UTIL_H_