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

chrome/browser/chromeos/system_logs/device_event_log_source.cc

 // 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.
 
 #include "chrome/browser/chromeos/system_logs/device_event_log_source.h"
 
 #include "base/message_loop/message_loop.h"
 #include "components/device_event_log/device_event_log.h"
 #include "content/public/browser/browser_thread.h"
 
 namespace system_logs {
 
 const char kNetworkEventLogEntry[] = "network_event_log";
 const char kDeviceEventLogEntry[] = "device_event_log";
 
 DeviceEventLogSource::DeviceEventLogSource() : SystemLogsSource("DeviceEvent") {
 }
 
 DeviceEventLogSource::~DeviceEventLogSource() {
 }
 
 void DeviceEventLogSource::Fetch(const SysLogsSourceCallback& callback) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   DCHECK(!callback.is_null());
 
-  scoped_ptr<SystemLogsResponse> response(new SystemLogsResponse);
+  std::unique_ptr<SystemLogsResponse> response(new SystemLogsResponse);
   const int kMaxDeviceEventsForAboutSystem = 400;
   (*response)[kNetworkEventLogEntry] = device_event_log::GetAsString(
       device_event_log::OLDEST_FIRST, "time,file,level", "network",
       device_event_log::kDefaultLogLevel, kMaxDeviceEventsForAboutSystem);
   (*response)[kDeviceEventLogEntry] = device_event_log::GetAsString(
       device_event_log::OLDEST_FIRST, "time,file,type,level", "non-network",
       device_event_log::LOG_LEVEL_DEBUG, kMaxDeviceEventsForAboutSystem);
   callback.Run(response.get());
 }
 
 }  // namespace system_logs