Move //device/sensor impl to be part of the internal implemenation of the Device Service.

device/sensors/device_sensor_host.h

-// Copyright 2016 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_SENSORS_DEVICE_SENSOR_HOST_H_
-#define DEVICE_SENSORS_DEVICE_SENSOR_HOST_H_
-
-#include "base/macros.h"
-#include "base/memory/shared_memory.h"
-#include "device/sensors/device_sensors_consts.h"
-#include "device/sensors/public/interfaces/light.mojom.h"
-#include "device/sensors/public/interfaces/motion.mojom.h"
-#include "device/sensors/public/interfaces/orientation.mojom.h"
-#include "mojo/public/cpp/bindings/interface_request.h"
-
-namespace device {
-
-// A base class for device sensor related mojo interface implementations.
-template <typename MojoInterface, ConsumerType consumer_type>
-class DeviceSensorHost : NON_EXPORTED_BASE(public MojoInterface) {
- public:
-  static void Create(mojo::InterfaceRequest<MojoInterface> request);
-
-  // All methods below to be called on the IO thread.
-  ~DeviceSensorHost() override;
-
- private:
-  DeviceSensorHost();
-
-  void StartPolling(
-      const typename MojoInterface::StartPollingCallback& callback) override;
-  void StopPolling() override;
-
-  bool is_started_;
-
-  base::ThreadChecker thread_checker_;
-
-  DISALLOW_COPY_AND_ASSIGN(DeviceSensorHost);
-};
-
-using DeviceLightHost =
-    DeviceSensorHost<device::mojom::LightSensor, CONSUMER_TYPE_LIGHT>;
-using DeviceMotionHost =
-    DeviceSensorHost<device::mojom::MotionSensor, CONSUMER_TYPE_MOTION>;
-using DeviceOrientationHost = DeviceSensorHost<device::mojom::OrientationSensor,
-                                               CONSUMER_TYPE_ORIENTATION>;
-using DeviceOrientationAbsoluteHost =
-    DeviceSensorHost<device::mojom::OrientationAbsoluteSensor,
-                     CONSUMER_TYPE_ORIENTATION_ABSOLUTE>;
-
-}  // namespace device
-
-#endif  // DEVICE_SENSORS_DEVICE_SENSOR_HOST_H_