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

modules/mediarecorder/MediaRecorderOptions.idl

+// 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-record/MediaRecorder.html#MediaRecorderOptions
+
+dictionary MediaRecorderOptions {
+    DOMString mimeType;  // Encoding mimeType.
+
+    // TODO(mcasas): Consider changing the following options to signed: https://github.com/w3c/mediacapture-record/issues/48, and/or using [EnforceRange]/[Clamp].
+    unsigned long audioBitsPerSecond;
+    unsigned long videoBitsPerSecond;
+    unsigned long bitsPerSecond;
+};