Shape detection service: Add QR detection in Mac

services/shape_detection/detection_utils_mac.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_DETECTION_UTILS_MAC_H_
+#define SERVICES_SHAPE_DETECTION_DETECTION_UTILS_MAC_H_
+
+#import <QuartzCore/QuartzCore.h>
+
+#include "base/mac/scoped_nsobject.h"
+#include "services/shape_detection/public/interfaces/barcodedetection.mojom.h"
+
+namespace shape_detection {
+
+// Takes a ScopedSharedBufferHandle with dimensions and produces a new CIImage
+// with the same contents, or a null scoped_nsobject is something goes wrong.
+base::scoped_nsobject<CIImage> CreateCIImageFromSharedMemory(
+    mojo::ScopedSharedBufferHandle frame_data,
+    uint32_t width,
+    uint32_t height);
+
+}  // namespace shape_detection
+
+#endif  // SERVICES_SHAPE_DETECTION_DETECTION_UTILS_MAC_H_