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diff --git a/dom/webidl/DOMQuad.webidl b/dom/webidl/DOMQuad.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
+ * https://drafts.fxtf.org/geometry/
+ *
+ * Copyright © 2012 W3C® (MIT, ERCIM, Keio), All Rights Reserved. W3C
+ * liability, trademark and document use rules apply.
+ */
+
+[Exposed=(Window,Worker),
+ Serializable]
+interface DOMQuad {
+    constructor(optional DOMPointInit p1 = {}, optional DOMPointInit p2 = {},
+                optional DOMPointInit p3 = {}, optional DOMPointInit p4 = {});
+    constructor(DOMRectReadOnly rect);
+
+    [NewObject] static DOMQuad fromRect(optional DOMRectInit other = {});
+    [NewObject] static DOMQuad fromQuad(optional DOMQuadInit other = {});
+
+    [SameObject] readonly attribute DOMPoint p1;
+    [SameObject] readonly attribute DOMPoint p2;
+    [SameObject] readonly attribute DOMPoint p3;
+    [SameObject] readonly attribute DOMPoint p4;
+    [NewObject] DOMRectReadOnly getBounds();
+
+    [Default] object toJSON();
+};
+
+dictionary DOMQuadInit {
+    DOMPointInit p1 = {};
+    DOMPointInit p2 = {};
+    DOMPointInit p3 = {};
+    DOMPointInit p4 = {};
+};