Make DeviceSensorService implement MainLoop::DestructionObserver

services/device/device_service.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_DEVICE_SERVICE_H_
 #define SERVICES_DEVICE_DEVICE_SERVICE_H_
 
 #include "base/memory/ref_counted.h"
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/device/public/interfaces/fingerprint.mojom.h"
 #include "services/device/public/interfaces/power_monitor.mojom.h"
 #include "services/device/public/interfaces/time_zone_monitor.mojom.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
 
 namespace device {
 
 class PowerMonitorMessageBroadcaster;
 class TimeZoneMonitor;
 
 std::unique_ptr<service_manager::Service> CreateDeviceService(
-    scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
+    scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
+    scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
 
 class DeviceService
     : public service_manager::Service,
       public service_manager::InterfaceFactory<mojom::Fingerprint>,
       public service_manager::InterfaceFactory<mojom::PowerMonitor>,
       public service_manager::InterfaceFactory<mojom::TimeZoneMonitor> {
  public:
-  DeviceService(scoped_refptr<base::SingleThreadTaskRunner> file_task_runner);
+  DeviceService(scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
+                scoped_refptr<base::SingleThreadTaskRunner> io_task_runner);
   ~DeviceService() override;
 
  private:
   // service_manager::Service:
   void OnStart() override;
   bool OnConnect(const service_manager::ServiceInfo& remote_info,
                  service_manager::InterfaceRegistry* registry) override;
 
   // InterfaceFactory<mojom::Fingerprint>:
   void Create(const service_manager::Identity& remote_identity,
               mojom::FingerprintRequest request) override;
 
   // InterfaceFactory<mojom::PowerMonitor>:
   void Create(const service_manager::Identity& remote_identity,
               mojom::PowerMonitorRequest request) override;
 
   // InterfaceFactory<mojom::TimeZoneMonitor>:
   void Create(const service_manager::Identity& remote_identity,
               mojom::TimeZoneMonitorRequest request) override;
 
   std::unique_ptr<device::PowerMonitorMessageBroadcaster>
       power_monitor_message_broadcaster_;
   std::unique_ptr<device::TimeZoneMonitor> time_zone_monitor_;
 
   scoped_refptr<base::SingleThreadTaskRunner> file_task_runner_;
+  scoped_refptr<base::SingleThreadTaskRunner> io_task_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(DeviceService);
 };
 
 }  // namespace device
 
 #endif  // SERVICES_DEVICE_DEVICE_SERVICE_H_