Shape Detection: add idl and mojom for face landmarks and wire for Mac

third_party/WebKit/Source/modules/shapedetection/Landmark.idl

Index: third_party/WebKit/Source/modules/shapedetection/Landmark.idl
diff --git a/third_party/WebKit/Source/modules/shapedetection/Landmark.idl b/third_party/WebKit/Source/modules/shapedetection/Landmark.idl
new file mode 100644
index 0000000000000000000000000000000000000000..6f578861faa76fdbb17df4e83dfee05817596854
--- /dev/null
+++ b/third_party/WebKit/Source/modules/shapedetection/Landmark.idl
@@ -0,0 +1,12 @@
+// 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.
+
+// https://wicg.github.io/shape-detection-api/#enumdef-landmarktype
+enum LandmarkType { "mouth", "eye" };
+
+// https://wicg.github.io/shape-detection-api/#dictdef-landmark
+dictionary Landmark {
+  required Point2D location;
+  LandmarkType type;
+};