[Do not submit] Worklet implementation.

third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.idl

Index: third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.idl
diff --git a/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.idl b/third_party/WebKit/Source/modules/worklet/WorkletGlobalScope.idl
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index 0000000000000000000000000000000000000000..0758db8f8fa8651fbdd7a70fe4e7046bb54ecca6
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+// 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.
+
+[
+    Exposed=Worklet,
+    Global=Worklet,
+    RuntimeEnabled=Worklet,
+    WillBeGarbageCollected,
+] interface WorkletGlobalScope {
+    // Console API (non-standard but widely implemented in some form)
+    // https://developer.chrome.com/devtools/docs/console-api
+    // [Replaceable] readonly attribute WorkerConsole console;
+};