Revert of Move //device/generic_sensor to be part of the internal implementation of the Device Service.

services/device/generic_sensor/sensor_provider_impl.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 SERVICES_DEVICE_GENERIC_SENSOR_SENSOR_PROVIDER_IMPL_H_
-#define SERVICES_DEVICE_GENERIC_SENSOR_SENSOR_PROVIDER_IMPL_H_
-
-#include "base/macros.h"
-#include "base/single_thread_task_runner.h"
-#include "services/device/public/interfaces/sensor_provider.mojom.h"
-
-namespace device {
-
-class PlatformSensorProvider;
-class PlatformSensor;
-
-// Implementation of SensorProvider mojo interface.
-// Uses PlatformSensorProvider singleton to create platform specific instances
-// of PlatformSensor which are used by SensorImpl.
-class SensorProviderImpl final : public mojom::SensorProvider {
- public:
-  static void Create(
-      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
-      mojom::SensorProviderRequest request);
-
-  ~SensorProviderImpl() override;
-
- private:
-  explicit SensorProviderImpl(PlatformSensorProvider* provider);
-
-  // SensorProvider implementation.
-  void GetSensor(mojom::SensorType type,
-                 mojom::SensorRequest sensor_request,
-                 const GetSensorCallback& callback) override;
-
-  // Helper callback method to return created sensors.
-  void SensorCreated(mojom::SensorType type,
-                     mojo::ScopedSharedBufferHandle cloned_handle,
-                     mojom::SensorRequest sensor_request,
-                     const GetSensorCallback& callback,
-                     scoped_refptr<PlatformSensor> sensor);
-
-  PlatformSensorProvider* provider_;
-  base::WeakPtrFactory<SensorProviderImpl> weak_ptr_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SensorProviderImpl);
-};
-
-}  // namespace device
-
-#endif  // SERVICES_DEVICE_GENERIC_SENSOR_SENSOR_PROVIDER_IMPL_H_