Shapedetection module: Blink side implementation

third_party/WebKit/public/platform/modules/shapedetection/shapedetection.mojom

+// 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.
+
+// https://wicg.github.io/shape-detection-api/#api
+
+module blink.mojom;
+
+import "ui/gfx/geometry/mojo/geometry.mojom";
+
+// Because "//ui/gfx/geometry/mojo" is not exposed to blink, we need to declare
+// a wrapper struct, so that gfx.mojom.RectF will not be directly referenced
+// inside blink, and browser can still use gfx types.
+struct FaceDetectionResult {
+  array<gfx.mojom.RectF> boundingBoxes;
+};
+
+interface ShapeDetection {
+  // frame_data contains tightly packed image pixels in ARGB32 format,
+  // row-major order.
+  DetectFace(handle<shared_buffer> frame_data, uint32 width, uint32 height)
+    => (FaceDetectionResult result);
+};