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

modules/worklet/WorkletGlobalScope.idl

Index: modules/worklet/WorkletGlobalScope.idl
diff --git a/modules/worklet/WorkletGlobalScope.idl b/modules/worklet/WorkletGlobalScope.idl
new file mode 100644
index 0000000000000000000000000000000000000000..f3ceb1e081b24c140f3598d338934fa830bfcb32
--- /dev/null
+++ b/modules/worklet/WorkletGlobalScope.idl
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+// 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://drafts.css-houdini.org/worklets/#workletglobalscope
+
+[
+    Exposed=Worklet,
+    Global=Worklet,
+    RuntimeEnabled=Worklet,
+    WillBeGarbageCollected,
+] interface WorkletGlobalScope {
+};