MediaStream Image Capture (1): idl and wireframe .h/.cpp/LayoutTest

third_party/WebKit/Source/modules/imagecapture/ImageCapture.idl

+// 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://w3c.github.io/mediacapture-image/index.html
+
+[
+    ActiveScriptWrappable,
+    ConstructorCallWith=ExecutionContext,
+    Constructor(MediaStreamTrack track),
+    RaisesException=Constructor,
+    RuntimeEnabled=ImageCapture,
+] interface ImageCapture {
+    readonly attribute MediaStreamTrack videoStreamTrack;
+
+    [CallWith=ScriptState, RaisesException] Promise<ImageBitmap> grabFrame();
+};