diff -r 000000000000 -r 6474c204b198 content/xul/document/public/nsIControllers.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/content/xul/document/public/nsIControllers.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,34 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/* 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 nsIController;
+interface nsIDOMXULCommandDispatcher;
+
+[scriptable, uuid(f36e3ec1-9197-4ad8-8d4c-d3b1927fd6df)]
+interface nsIControllers : nsISupports
+{
+	nsIController getControllerForCommand(in string command);
+
+	void insertControllerAt(in unsigned long index, in nsIController controller);
+	nsIController removeControllerAt(in unsigned long index);
+	nsIController getControllerAt(in unsigned long index);
+
+    void appendController(in nsIController controller);
+	void removeController(in nsIController controller);
+
+    /*
+        Return an ID for this controller which is unique to this
+        nsIControllers.
+    */
+    unsigned long getControllerId(in nsIController controller);
+    /*
+        Get the controller specified by the given ID.
+    */
+    nsIController getControllerById(in unsigned long controllerID);
+    
+	unsigned long getControllerCount();
+};