1 files changed, 9 insertions, 0 deletions
diff --git a/dom/webidl/WorkerTestUtils.webidl b/dom/webidl/WorkerTestUtils.webidl
new file mode 100644
index 0000000000..9c1ae31926
--- /dev/null
+++ b/dom/webidl/WorkerTestUtils.webidl
@@ -0,0 +1,9 @@
+/* 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/. */
+
+[Exposed=Worker, Pref="dom.workers.testing.enabled"]
+namespace WorkerTestUtils {
+  [Throws]
+  unsigned long currentTimerNestingLevel();
+};