Implement device::BatteryStatus support for UPower daemon 0.99.x

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 base {
-class DictionaryValue;
-}
+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,
 };
 
-// Returns the BatteryStatus computed using the provided dictionary.
-DEVICE_BATTERY_EXPORT BatteryStatus ComputeWebBatteryStatus(
-    const base::DictionaryValue& dictionary);
+// 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_