Shape Detection: Implement FaceDetection on Mac as out-of-process service

services/shape_detection/shape_detection_service.h

+// Copyright 2017 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_SHAPE_DETECTION_SHAPE_DETECTION_SERVICE_H_
+#define SERVICES_SHAPE_DETECTION_SHAPE_DETECTION_SERVICE_H_
+
+#include <memory>
+
+#include "base/callback.h"
+#include "base/macros.h"
+#include "services/service_manager/public/cpp/service.h"
+#include "services/service_manager/public/cpp/service_context_ref.h"
+
+namespace shape_detection {
+
+class ShapeDetectionService : public service_manager::Service {
+ public:
+  // Factory function for use as an embedded service.
+  static std::unique_ptr<service_manager::Service> Create();
+
+  ShapeDetectionService();
+  ~ShapeDetectionService() override;
+
+  void OnStart() override;
+  bool OnConnect(const service_manager::ServiceInfo& remote_info,
+                 service_manager::InterfaceRegistry* registry) override;
+  bool OnStop() override;
+
+ private:
+  std::unique_ptr<service_manager::ServiceContextRefFactory> ref_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(ShapeDetectionService);
+};
+
+}  // namespace shape_detection
+
+#endif  // SERVICES_SHAPE_DETECTION_SHAPE_DETECTION_SERVICE_H_