Basic XRReferenceSpace interface

components/script/dom/webidls/XRReferenceSpace.webidl

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+/* 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 https://mozilla.org/MPL/2.0/. */
+
+// https://immersive-web.github.io/webxr/#xrreferencespace-interface
+
+enum XRReferenceSpaceType {
+  "stationary",
+  "bounded",
+  "unbounded"
+};
+
+dictionary XRReferenceSpaceOptions {
+  required XRReferenceSpaceType type;
+};
+
+[SecureContext, Exposed=Window] interface XRReferenceSpace : XRSpace {
+  // attribute XRRigidTransform originOffset;
+  // attribute EventHandler onreset;
+};