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

device/generic_sensor/linux/sensor_device_manager.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_LINUX_SENSOR_DEVICE_MANAGER_H_
-#define DEVICE_GENERIC_SENSOR_LINUX_SENSOR_DEVICE_MANAGER_H_
-
-#include "base/scoped_observer.h"
-
-#include "base/single_thread_task_runner.h"
-#include "device/base/device_monitor_linux.h"
-#include "device/generic_sensor/generic_sensor_export.h"
-#include "device/generic_sensor/public/interfaces/sensor.mojom.h"
-
-namespace device {
-
-struct SensorInfoLinux;
-
-// This SensorDeviceManager uses LinuxDeviceMonitor to enumerate devices
-// and listen to "add/removed" events to notify |provider_| about
-// added or removed iio devices. It has own cache to speed up an identification
-// process of removed devices.
-class DEVICE_GENERIC_SENSOR_EXPORT SensorDeviceManager
-    : public DeviceMonitorLinux::Observer {
- public:
-  class Delegate {
-   public:
-    // Called when SensorDeviceManager has enumerated through all possible
-    // iio udev devices.
-    virtual void OnSensorNodesEnumerated() = 0;
-
-    // Called after SensorDeviceManager has identified a udev device, which
-    // belongs to "iio" subsystem.
-    virtual void OnDeviceAdded(mojom::SensorType type,
-                               std::unique_ptr<SensorInfoLinux> sensor) = 0;
-
-    // Called after "removed" event is received from LinuxDeviceMonitor and
-    // sensor is identified as known.
-    virtual void OnDeviceRemoved(mojom::SensorType type,
-                                 const std::string& device_node) = 0;
-
-   protected:
-    virtual ~Delegate() {}
-  };
-
-  SensorDeviceManager();
-  ~SensorDeviceManager() override;
-
-  // Starts this service.
-  virtual void Start(Delegate* delegate);
-
- protected:
-  using SensorDeviceMap = std::unordered_map<std::string, mojom::SensorType>;
-
-  // Wrappers around udev system methods that can be implemented differently
-  // by tests.
-  virtual std::string GetUdevDeviceGetSubsystem(udev_device* dev);
-  virtual std::string GetUdevDeviceGetSyspath(udev_device* dev);
-  virtual std::string GetUdevDeviceGetSysattrValue(
-      udev_device* dev,
-      const std::string& attribute);
-  virtual std::string GetUdevDeviceGetDevnode(udev_device* dev);
-
-  // DeviceMonitorLinux::Observer:
-  void OnDeviceAdded(udev_device* udev_device) override;
-  void OnDeviceRemoved(udev_device* device) override;
-
-  // Represents a map of sensors that are already known to this manager after
-  // initial enumeration.
-  SensorDeviceMap sensors_by_node_;
-
-  THREAD_CHECKER(thread_checker_);
-
-  ScopedObserver<DeviceMonitorLinux, DeviceMonitorLinux::Observer> observer_;
-
-  Delegate* delegate_;
-
-  // A task runner, which |delegate_| lives on.
-  scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
-
-  DISALLOW_COPY_AND_ASSIGN(SensorDeviceManager);
-};
-
-}  // namespace device
-
-#endif  // DEVICE_GENERIC_SENSOR_LINUX_SENSOR_DEVICE_MANAGER_H_