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

device/generic_sensor/platform_sensor_provider_mac.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_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_MAC_H_
-#define DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_MAC_H_
-
-#include "device/generic_sensor/platform_sensor_provider.h"
-
-namespace device {
-
-class PlatformSensorProviderMac : public PlatformSensorProvider {
- public:
-  PlatformSensorProviderMac();
-  ~PlatformSensorProviderMac() override;
-
-  static PlatformSensorProviderMac* GetInstance();
-
- protected:
-  void CreateSensorInternal(mojom::SensorType type,
-                            mojo::ScopedSharedBufferMapping mapping,
-                            const CreateSensorCallback& callback) override;
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(PlatformSensorProviderMac);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_GENERIC_SENSOR_PLATFORM_SENSOR_PROVIDER_MAC_H_