[Mojo Video Capture] Stop service when last client disconnects.

services/video_capture/service_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_VIDEO_CAPTURE_VIDEO_CAPTURE_SERVICE_H_
-#define SERVICES_VIDEO_CAPTURE_VIDEO_CAPTURE_SERVICE_H_
+#ifndef SERVICES_VIDEO_CAPTURE_SERVICE_IMPL_H_
+#define SERVICES_VIDEO_CAPTURE_SERVICE_IMPL_H_
 
 #include <memory>
 
 #include "mojo/public/cpp/bindings/binding_set.h"
 #include "services/service_manager/public/cpp/binder_registry.h"
 #include "services/service_manager/public/cpp/interface_factory.h"
 #include "services/service_manager/public/cpp/service.h"
-#include "services/video_capture/public/interfaces/service.mojom.h"
+#include "services/service_manager/public/cpp/service_context_ref.h"
+#include "services/video_capture/public/interfaces/device_factory_provider.mojom.h"
 
 namespace video_capture {
 
-class DeviceFactoryMediaToMojoAdapter;
-
-// Implementation of video_capture::mojom::Service as a Service Manager service.
-class ServiceImpl : public service_manager::Service,
-                    public service_manager::InterfaceFactory<mojom::Service>,
-                    public mojom::Service {
+class ServiceImpl : public service_manager::Service {
  public:
   ServiceImpl();
   ~ServiceImpl() override;
 
-  // service_manager::Service:
+  // service_manager::Service implementation.
+  void OnStart() override;
   void OnBindInterface(const service_manager::ServiceInfo& source_info,
                        const std::string& interface_name,
                        mojo::ScopedMessagePipeHandle interface_pipe) override;
-
-  // service_manager::InterfaceFactory<video_capture::mojom::Service>:
-  void Create(const service_manager::Identity& remote_identity,
-              mojom::ServiceRequest request) override;
-
-  // video_capture::mojom::Service
-  void ConnectToDeviceFactory(mojom::DeviceFactoryRequest request) override;
-  void ConnectToFakeDeviceFactory(mojom::DeviceFactoryRequest request) override;
+  bool OnServiceManagerConnectionLost() override;
 
  private:
-  void LazyInitializeDeviceFactory();
-  void LazyInitializeFakeDeviceFactory();
+  void OnDeviceFactoryProviderRequest(
+      mojom::DeviceFactoryProviderRequest request);
+  void SetShutdownDelayInSeconds(float seconds);
+  void MaybeRequestQuitDelayed();
+  void MaybeRequestQuit();
 
+  float shutdown_delay_in_seconds_;
   service_manager::BinderRegistry registry_;
-  mojo::BindingSet<mojom::Service> service_bindings_;
-  mojo::BindingSet<mojom::DeviceFactory> factory_bindings_;
-  mojo::BindingSet<mojom::DeviceFactory> fake_factory_bindings_;
-  std::unique_ptr<DeviceFactoryMediaToMojoAdapter> device_factory_;
-  std::unique_ptr<DeviceFactoryMediaToMojoAdapter> fake_device_factory_;
+  std::unique_ptr<service_manager::ServiceContextRefFactory> ref_factory_;
+  base::ThreadChecker thread_checker_;
+  base::WeakPtrFactory<ServiceImpl> weak_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ServiceImpl);
 };
 
 }  // namespace video_capture
 
-#endif  // SERVICES_VIDEO_CAPTURE_VIDEO_CAPTURE_SERVICE_H_
+#endif  // SERVICES_VIDEO_CAPTURE_SERVICE_IMPL_H_