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

third_party/WebKit/Source/modules/shapedetection/FaceDetector.cpp

 // 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.
 
 #include "modules/shapedetection/FaceDetector.h"
 
 #include "core/dom/DOMException.h"
 #include "core/dom/DOMRect.h"
 #include "core/frame/LocalDOMWindow.h"
 #include "core/frame/LocalFrame.h"
 #include "core/html/canvas/CanvasImageSource.h"
 #include "modules/shapedetection/DetectedFace.h"
 #include "modules/shapedetection/FaceDetectorOptions.h"
+#include "platform/ServiceConnector.h"
 #include "public/platform/InterfaceProvider.h"
 #include "public/platform/modules/shapedetection/facedetection_provider.mojom-blink.h"
+#include "services/shape_detection/public/interfaces/constants.mojom-blink.h"
 
 namespace blink {
 
 FaceDetector* FaceDetector::create(Document& document,
                                    const FaceDetectorOptions& options) {
   return new FaceDetector(*document.frame(), options);
 }
 
 FaceDetector::FaceDetector(LocalFrame& frame,
                            const FaceDetectorOptions& options)
     : ShapeDetector(frame) {
   mojom::blink::FaceDetectorOptionsPtr faceDetectorOptions =
       mojom::blink::FaceDetectorOptions::New();
   faceDetectorOptions->max_detected_faces = options.maxDetectedFaces();
   faceDetectorOptions->fast_mode = options.fastMode();
   mojom::blink::FaceDetectionProviderPtr provider;
+#if OS(MACOSX)
+  ServiceConnector::instance().connectToInterface(
+      shape_detection::mojom::blink::kServiceName,
+      mojo::MakeRequest(&provider));
+#else
+  // TODO(xianglu): Move Android implementation to service/ as well.
   frame.interfaceProvider()->getInterface(mojo::MakeRequest(&provider));
+#endif
   provider->CreateFaceDetection(mojo::MakeRequest(&m_faceService),
                                 std::move(faceDetectorOptions));
-
   m_faceService.set_connection_error_handler(convertToBaseCallback(WTF::bind(
       &FaceDetector::onFaceServiceConnectionError, wrapWeakPersistent(this))));
 }
 
 ScriptPromise FaceDetector::doDetect(
     ScriptPromiseResolver* resolver,
     mojo::ScopedSharedBufferHandle sharedBufferHandle,
     int imageWidth,
     int imageHeight) {
   ScriptPromise promise = resolver->promise();
@@ skipping 34 matching lines @@
   m_faceServiceRequests.clear();
   m_faceService.reset();
 }
 
 DEFINE_TRACE(FaceDetector) {
   ShapeDetector::trace(visitor);
   visitor->trace(m_faceServiceRequests);
 }
 
 }  // namespace blink