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diff --git a/dom/webidl/DedicatedWorkerGlobalScope.webidl b/dom/webidl/DedicatedWorkerGlobalScope.webidl
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+/* -*- Mode: IDL; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this file,
+ * You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * The origin of this IDL file is
+ * http://www.whatwg.org/specs/web-apps/current-work/multipage/workers.html#the-workerglobalscope-common-interface
+ *
+ * © Copyright 2004-2011 Apple Computer, Inc., Mozilla Foundation, and Opera
+ * Software ASA.
+ * You are granted a license to use, reproduce and create derivative works of
+ * this document.
+ */
+
+[Global=(Worker,DedicatedWorker),
+ Exposed=DedicatedWorker]
+interface DedicatedWorkerGlobalScope : WorkerGlobalScope {
+  [Replaceable]
+  readonly attribute DOMString name;
+
+  [Throws]
+  undefined postMessage(any message, sequence<object> transfer);
+  [Throws]
+  undefined postMessage(any message, optional StructuredSerializeOptions options = {});
+
+  undefined close();
+
+  attribute EventHandler onmessage;
+  attribute EventHandler onmessageerror;
+
+  // https://html.spec.whatwg.org/multipage/imagebitmap-and-animations.html#animation-frames
+  // Ideally we would just include AnimationFrameProvider to add the interface,
+  // but we cannot make an include conditional.
+  [Pref="dom.workers.requestAnimationFrame", Throws]
+  long requestAnimationFrame(FrameRequestCallback callback);
+
+  [Pref="dom.workers.requestAnimationFrame", Throws]
+  undefined cancelAnimationFrame(long handle);
+};