diff -r 000000000000 -r 6474c204b198 dom/apps/src/InterAppComm.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/apps/src/InterAppComm.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,27 @@
+/* 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_dom_apps_InterAppComm_h
+#define mozilla_dom_apps_InterAppComm_h
+
+#include "mozilla/dom/MozInterAppMessageEvent.h"
+
+// Forward declarations.
+struct JSContext;
+class JSObject;
+
+namespace mozilla {
+namespace dom {
+
+class InterAppComm
+{
+public:
+  static bool EnabledForScope(JSContext* /* unused */,
+			      JS::Handle<JSObject*> /* unused */);
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif // mozilla_dom_apps_InterAppComm_h