Sync ui/events to chromium @ https://codereview.chromium.org/1210203002

ui/events/ozone/device/udev/device_manager_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 UI_EVENTS_OZONE_DEVICE_UDEV_DEVICE_MANAGER_UDEV_H_
+#define UI_EVENTS_OZONE_DEVICE_UDEV_DEVICE_MANAGER_UDEV_H_
+
+#include "base/message_loop/message_pump_libevent.h"
+#include "base/observer_list.h"
+#include "device/udev_linux/scoped_udev.h"
+#include "ui/events/ozone/device/device_manager.h"
+
+namespace ui {
+
+class DeviceEvent;
+class DeviceEventObserver;
+
+class DeviceManagerUdev
+    : public DeviceManager, base::MessagePumpLibevent::Watcher {
+ public:
+  DeviceManagerUdev();
+  ~DeviceManagerUdev() override;
+
+ private:
+  scoped_ptr<DeviceEvent> ProcessMessage(udev_device* device);
+
+  // Creates a device-monitor to look for device add/remove/change events.
+  void CreateMonitor();
+
+  // DeviceManager overrides:
+  void ScanDevices(DeviceEventObserver* observer) override;
+  void AddObserver(DeviceEventObserver* observer) override;
+  void RemoveObserver(DeviceEventObserver* observer) override;
+
+  // base::MessagePumpLibevent::Watcher overrides:
+  void OnFileCanReadWithoutBlocking(int fd) override;
+  void OnFileCanWriteWithoutBlocking(int fd) override;
+
+  device::ScopedUdevPtr udev_;
+  device::ScopedUdevMonitorPtr monitor_;
+
+  base::MessagePumpLibevent::FileDescriptorWatcher controller_;
+
+  base::ObserverList<DeviceEventObserver> observers_;
+
+  DISALLOW_COPY_AND_ASSIGN(DeviceManagerUdev);
+};
+
+}  // namespace ui
+
+#endif  // UI_EVENTS_OZONE_DEVICE_UDEV_DEVICE_MANAGER_UDEV_H_