Cleanup: Merge device/udev_linux/udev.{cc,h} into device/udev_linux/scoped_udev.h.

device/udev_linux/udev.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 DEVICE_UDEV_LINUX_UDEV_H_
-#define DEVICE_UDEV_LINUX_UDEV_H_
-
-#include <libudev.h>
-
-#include "base/memory/scoped_ptr.h"
-
-#if !defined(USE_UDEV)
-#error "USE_UDEV not defined"
-#endif
-
-namespace device {
-
-struct UdevDeleter {
-  void operator()(udev* dev) const;
-};
-struct UdevEnumerateDeleter {
-  void operator()(udev_enumerate* enumerate) const;
-};
-struct UdevDeviceDeleter {
-  void operator()(udev_device* device) const;
-};
-struct UdevMonitorDeleter {
-  void operator()(udev_monitor* monitor) const;
-};
-
-typedef scoped_ptr<udev, UdevDeleter> ScopedUdevPtr;
-typedef scoped_ptr<udev_enumerate, UdevEnumerateDeleter> ScopedUdevEnumeratePtr;
-typedef scoped_ptr<udev_device, UdevDeviceDeleter> ScopedUdevDevicePtr;
-typedef scoped_ptr<udev_monitor, UdevMonitorDeleter> ScopedUdevMonitorPtr;
-
-}  // namespace device
-
-#endif  // DEVICE_UDEV_LINUX_UDEV_H_