Roll 50: Copied IDLs, PYTHON scripts from WebKit removed deleted files in WebCore

modules/mediastream/MediaStreamConstraints.idl

Index: modules/mediastream/MediaStreamConstraints.idl
diff --git a/modules/mediastream/MediaStreamConstraints.idl b/modules/mediastream/MediaStreamConstraints.idl
new file mode 100644
index 0000000000000000000000000000000000000000..b5a8fee409e04df279a89ce2fa51379f143c32d6
--- /dev/null
+++ b/modules/mediastream/MediaStreamConstraints.idl
@@ -0,0 +1,10 @@
+// Copyright 2015 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-main/getusermedia.html#idl-def-MediaStreamConstraints
+
+dictionary MediaStreamConstraints {
+  (boolean or MediaTrackConstraintSet) video;
+  (boolean or MediaTrackConstraintSet) audio;
+};