ShapeDetection: add support for Text Detection in Mac

services/shape_detection/text_detection_impl_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_TEXT_DETECTION_IMPL_MAC_H_
+#define SERVICES_SHAPE_DETECTION_TEXT_DETECTION_IMPL_MAC_H_
+
+#include "base/mac/scoped_nsobject.h"
+#include "services/shape_detection/public/interfaces/textdetection.mojom.h"
+
+@class CIDetector;
+
+namespace shape_detection {
+
+class TextDetectionImplMac : public mojom::TextDetection {
+ public:
+  TextDetectionImplMac();
+  ~TextDetectionImplMac() override;
+
+  void Detect(mojo::ScopedSharedBufferHandle frame_data,
+              uint32_t width,
+              uint32_t height,
+              const mojom::TextDetection::DetectCallback& callback) override;
+
+ private:
+  base::scoped_nsobject<CIDetector> detector_;
+
+  DISALLOW_COPY_AND_ASSIGN(TextDetectionImplMac);
+};
+
+}  // namespace shape_detection
+
+#endif  // SERVICES_SHAPE_DETECTION_TEXT_DETECTION_IMPL_MAC_H_