Reland "Add Linux support for the Bluetooth API"

device/bluetooth/bluetooth_gatt_connection_chromeos.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_BLUETOOTH_BLUETOOTH_GATT_CONNECTION_CHROMEOS_H_
-#define DEVICE_BLUETOOTH_BLUETOOTH_GATT_CONNECTION_CHROMEOS_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/memory/weak_ptr.h"
-#include "dbus/object_path.h"
-#include "device/bluetooth/bluetooth_gatt_connection.h"
-#include "device/bluetooth/dbus/bluetooth_device_client.h"
-
-namespace device {
-
-class BluetoothAdapter;
-
-}  // namespace device
-
-namespace chromeos {
-
-// BluetoothGattConnectionChromeOS implements BluetoothGattConnection for the
-// Chrome OS platform.
-class BluetoothGattConnectionChromeOS
-    : public device::BluetoothGattConnection,
-      public bluez::BluetoothDeviceClient::Observer {
- public:
-  explicit BluetoothGattConnectionChromeOS(
-      scoped_refptr<device::BluetoothAdapter> adapter,
-      const std::string& device_address,
-      const dbus::ObjectPath& object_path);
-  ~BluetoothGattConnectionChromeOS() override;
-
-  // BluetoothGattConnection overrides.
-  bool IsConnected() override;
-  void Disconnect() override;
-
- private:
-  // bluez::Bluetooth$1Client::Observer overrides.
-  void DeviceRemoved(const dbus::ObjectPath& object_path) override;
-  void DevicePropertyChanged(const dbus::ObjectPath& object_path,
-                             const std::string& property_name) override;
-
-  // True, if the connection is currently active.
-  bool connected_;
-
-  // D-Bus object path of the underlying device. This is used to filter observer
-  // events.
-  dbus::ObjectPath object_path_;
-
-  DISALLOW_COPY_AND_ASSIGN(BluetoothGattConnectionChromeOS);
-};
-
-}  // namespace chromeos
-
-#endif  // DEVICE_BLUETOOTH_BLUETOOTH_GATT_CONNECTION_CHROMEOS_H_