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

services/shape_detection/face_detection_impl_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 SERVICES_SHAPE_DETECTION_FACE_DETECTION_IMPL_MAC_H_
+#define SERVICES_SHAPE_DETECTION_FACE_DETECTION_IMPL_MAC_H_
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "services/shape_detection/face_detection_impl.h"
+
+namespace shape_detection {
+
+class FaceDetectionImplMac : public FaceDetectionImpl {
+ public:
+  FaceDetectionImplMac();
+  ~FaceDetectionImplMac() override;
+
+  void Detect(mojo::ScopedSharedBufferHandle frame_data,
+              uint32_t width,
+              uint32_t height,
+              blink::mojom::FaceDetectorOptionsPtr options,
+              const FaceDetectionImpl::DetectCallback& callback) override;
+
+ private:
+  void RunCallbackWithFaces(const DetectCallback& callback,
+                            blink::mojom::FaceDetectionResultPtr faces);
+  void RunCallbackWithNoFaces(const DetectCallback& callback);
+
+  base::scoped_nsobject<CIContext> context_;
+  base::scoped_nsobject<CIDetector> detector_;
+  DISALLOW_COPY_AND_ASSIGN(FaceDetectionImplMac);
+};
+
+}  // namespace shape_detection
+
+#endif  // SERVICES_SHAPE_DETECTION_FACE_DETECTION_IMPL_MAC_H_