ui: Cleanup the usage of scoped_ptr throughout.

ui/events/ozone/device/device_manager.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 "ui/events/ozone/device/device_manager.h"
 
 #if defined(USE_UDEV)
 #include "ui/events/ozone/device/udev/device_manager_udev.h"
 #else
 #include "ui/events/ozone/device/device_manager_manual.h"
 #endif
 
 namespace ui {
 
 scoped_ptr<DeviceManager> CreateDeviceManager() {
 #if defined(USE_UDEV)
-  return scoped_ptr<DeviceManager>(new DeviceManagerUdev());
+  return make_scoped_ptr(new DeviceManagerUdev());
 #else
-  return scoped_ptr<DeviceManager>(new DeviceManagerManual());
+  return make_scoped_ptr(new DeviceManagerManual());
 #endif
 }
 
 }  // namespace ui