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

modules/webusb/USBIsochronousInTransferPacket.idl

Index: modules/webusb/USBIsochronousInTransferPacket.idl
diff --git a/modules/webusb/USBIsochronousInTransferPacket.idl b/modules/webusb/USBIsochronousInTransferPacket.idl
new file mode 100644
index 0000000000000000000000000000000000000000..3129bde5ae67724d9a15bd7d3b4c75c06c3772dd
--- /dev/null
+++ b/modules/webusb/USBIsochronousInTransferPacket.idl
@@ -0,0 +1,13 @@
+// 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/webusb/#idl-def-usbisochronousintransferpacket
+
+[
+    GarbageCollected,
+    RuntimeEnabled=WebUSB,
+] interface USBIsochronousInTransferPacket {
+    readonly attribute USBTransferStatus status;
+    readonly attribute DataView data;
+};