diff -r 000000000000 -r 6474c204b198 dom/media/nsIMediaManager.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/media/nsIMediaManager.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,23 @@
+/* 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/. */
+
+#include "nsISupports.idl"
+
+interface nsISupportsArray;
+interface nsIDOMWindow;
+
+%{C++
+#define NS_MEDIAMANAGERSERVICE_CID {0xabc622ea, 0x9655, 0x4123, {0x80, 0xd9, 0x22, 0x62, 0x1b, 0xdd, 0x54, 0x65}}
+#define MEDIAMANAGERSERVICE_CONTRACTID "@mozilla.org/mediaManagerService;1"
+%}
+
+[scriptable, builtinclass, uuid(2efff6ab-0e3e-4cc4-8f9b-4aaca59a1140)]
+interface nsIMediaManagerService : nsISupports
+{
+  /* return a array of inner windows that have active captures */
+  readonly attribute nsISupportsArray activeMediaCaptureWindows;
+
+  /* Get the capture state for the given window and all descendant windows (iframes, etc) */
+  void mediaCaptureWindowState(in nsIDOMWindow aWindow, out boolean aVideo, out boolean aAudio);
+};