| // 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. | |
| // Spec: https://html.spec.whatwg.org/#elementdefinitionoptions | |
| dictionary ElementDefinitionOptions { | |
| DOMString? extends = null; | |
| }; |