Revert 247926 "HID backend"

trunk/src/device/hid/hid_service_linux.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_HID_HID_SERVICE_LINUX_H_
-#define DEVICE_HID_HID_SERVICE_LINUX_H_
-
-#include <libudev.h>
-
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/message_loop/message_pump_libevent.h"
-#include "device/hid/hid_device_info.h"
-#include "device/hid/hid_service.h"
-
-namespace device {
-
-class HidConnection;
-
-template<typename T, void func(T*)>
-struct Deleter {
-  void operator()(T* enumerate) const {
-    if (enumerate != NULL)
-      func(enumerate);
-  }
-};
-
-typedef Deleter<udev_enumerate, udev_enumerate_unref> UdevEnumerateDeleter;
-typedef Deleter<udev_device, udev_device_unref> UdevDeviceDeleter;
-typedef Deleter<udev, udev_unref> UdevDeleter;
-typedef Deleter<udev_monitor, udev_monitor_unref> UdevMonitorDeleter;
-
-typedef scoped_ptr<udev_device, UdevDeviceDeleter> ScopedUdevDevicePtr;
-typedef scoped_ptr<udev_enumerate, UdevEnumerateDeleter> ScopedUdevEnumeratePtr;
-
-class HidServiceLinux : public HidService,
-                        public base::MessagePumpLibevent::Watcher {
- public:
-  HidServiceLinux();
-
-  virtual scoped_refptr<HidConnection> Connect(std::string device_id) OVERRIDE;
-
-  // Implements base::MessagePumpLibevent::Watcher
-  virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE;
-  virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE;
-
- private:
-  virtual ~HidServiceLinux();
-
-  void Enumerate();
-  void PlatformDeviceAdd(udev_device* device);
-  void PlatformDeviceRemove(udev_device* raw_dev);
-
-  scoped_ptr<udev, UdevDeleter> udev_;
-  scoped_ptr<udev_monitor, UdevMonitorDeleter> monitor_;
-  int monitor_fd_;
-  base::MessagePumpLibevent::FileDescriptorWatcher monitor_watcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(HidServiceLinux);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_HID_HID_SERVICE_LINUX_H_