diff -r 000000000000 -r 6474c204b198 content/base/src/nsDOMDataChannelDeclarations.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/base/src/nsDOMDataChannelDeclarations.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,30 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set sw=2 ts=8 et 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 nsDOMDataChannelDeclarations_h
+#define nsDOMDataChannelDeclarations_h
+
+// This defines only what's necessary to create nsDOMDataChannels, since this
+// gets used with MOZ_INTERNAL_API not set for media/webrtc/signaling/testing
+
+#include "nsCOMPtr.h"
+#include "nsIDOMDataChannel.h"
+
+namespace mozilla {
+   class DataChannel;
+}
+
+class nsPIDOMWindow;
+
+nsresult
+NS_NewDOMDataChannel(already_AddRefed<mozilla::DataChannel>&& dataChannel,
+                     nsPIDOMWindow* aWindow,
+                     nsIDOMDataChannel** domDataChannel);
+
+// Tell DataChannel it's ok to deliver open and message events
+void NS_DataChannelAppReady(nsIDOMDataChannel* domDataChannel);
+
+#endif // nsDOMDataChannelDeclarations_h