1 files changed, 23 insertions, 0 deletions
diff --git a/dom/base/CallState.h b/dom/base/CallState.h
new file mode 100644
index 0000000000..e9c312dbe4
--- /dev/null
+++ b/dom/base/CallState.h
@@ -0,0 +1,23 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* 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/. */
+
+#ifndef mozilla_CallState_h
+#define mozilla_CallState_h
+
+namespace mozilla {
+
+// An enum class to be used for returned value of callback functions.  If Stop
+// is returned from the callback function, caller stops calling further
+// children. If Continue is returned then caller will keep calling further
+// children.
+enum class CallState {
+  Continue,
+  Stop,
+};
+
+}  // namespace mozilla
+
+#endif  // mozilla_CallSate_h