[DeviceService] Expose battery monitoring solely via the Device Service

device/battery/battery_status_manager_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_BATTERY_BATTERY_STATUS_MANAGER_LINUX_H_
-#define DEVICE_BATTERY_BATTERY_STATUS_MANAGER_LINUX_H_
-
-#include "device/battery/battery_export.h"
-#include "device/battery/battery_status.mojom.h"
-#include "device/battery/battery_status_manager.h"
-
-namespace dbus {
-class Bus;
-}  // namespace dbus
-
-namespace device {
-// UPowerDeviceState reflects the possible UPower.Device.State values,
-// see upower.freedesktop.org/docs/Device.html#Device:State.
-enum UPowerDeviceState {
-  UPOWER_DEVICE_STATE_UNKNOWN = 0,
-  UPOWER_DEVICE_STATE_CHARGING = 1,
-  UPOWER_DEVICE_STATE_DISCHARGING = 2,
-  UPOWER_DEVICE_STATE_EMPTY = 3,
-  UPOWER_DEVICE_STATE_FULL = 4,
-  UPOWER_DEVICE_STATE_PENDING_CHARGE = 5,
-  UPOWER_DEVICE_STATE_PENDING_DISCHARGE = 6,
-};
-
-// UPowerDeviceType reflects the possible UPower.Device.Type values,
-// see upower.freedesktop.org/docs/Device.html#Device:Type.
-enum UPowerDeviceType {
-  UPOWER_DEVICE_TYPE_UNKNOWN = 0,
-  UPOWER_DEVICE_TYPE_LINE_POWER = 1,
-  UPOWER_DEVICE_TYPE_BATTERY = 2,
-  UPOWER_DEVICE_TYPE_UPS = 3,
-  UPOWER_DEVICE_TYPE_MONITOR = 4,
-  UPOWER_DEVICE_TYPE_MOUSE = 5,
-  UPOWER_DEVICE_TYPE_KEYBOARD = 6,
-  UPOWER_DEVICE_TYPE_PDA = 7,
-  UPOWER_DEVICE_TYPE_PHONE = 8,
-};
-
-// Creates a notification thread and delegates Start/Stop calls to it.
-class DEVICE_BATTERY_EXPORT BatteryStatusManagerLinux
-    : public BatteryStatusManager {
- public:
-  explicit BatteryStatusManagerLinux(
-      const BatteryStatusService::BatteryUpdateCallback& callback);
-  ~BatteryStatusManagerLinux() override;
-
- private:
-  friend class BatteryStatusManagerLinuxTest;
-  class BatteryStatusNotificationThread;
-
-  // BatteryStatusManager:
-  bool StartListeningBatteryChange() override;
-  void StopListeningBatteryChange() override;
-
-  // Starts the notifier thread if not already started and returns true on
-  // success.
-  bool StartNotifierThreadIfNecessary();
-  base::Thread* GetNotifierThreadForTesting();
-
-  static std::unique_ptr<BatteryStatusManagerLinux> CreateForTesting(
-      const BatteryStatusService::BatteryUpdateCallback& callback,
-      dbus::Bus* bus);
-
-  BatteryStatusService::BatteryUpdateCallback callback_;
-  std::unique_ptr<BatteryStatusNotificationThread> notifier_thread_;
-
-  DISALLOW_COPY_AND_ASSIGN(BatteryStatusManagerLinux);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_BATTERY_BATTERY_STATUS_MANAGER_LINUX_H_