diff -r 000000000000 -r 6474c204b198 dom/messages/interfaces/nsISystemMessagesInternal.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/dom/messages/interfaces/nsISystemMessagesInternal.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,67 @@
+/* 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 "domstubs.idl"
+
+interface nsIURI;
+interface nsIDOMWindow;
+
+// Implemented by the contract id @mozilla.org/system-message-internal;1
+
+[scriptable, uuid(6296a314-2abf-4cd0-9097-5e81ee6832e2)]
+interface nsISystemMessagesInternal : nsISupports
+{
+  /*
+   * Allow any internal user to broadcast a message of a given type.
+   * @param type        The type of the message to be sent.
+   * @param message     The message payload.
+   * @param pageURI     The URI of the page that will be opened.
+   * @param manifestURI The webapp's manifest URI.
+   * @param extra       Extra opaque information that will be passed around in the observer
+   *                    notification to open the page.
+   */
+  void sendMessage(in DOMString type, in jsval message, in nsIURI pageURI, in nsIURI manifestURI, [optional] in jsval extra);
+
+  /*
+   * Allow any internal user to broadcast a message of a given type.
+   * The application that registers the message will be launched.
+   * @param type        The type of the message to be sent.
+   * @param message     The message payload.
+   * @param extra       Extra opaque information that will be passed around in the observer
+   *                    notification to open the page.
+   */
+  void broadcastMessage(in DOMString type, in jsval message, [optional] in jsval extra);
+
+  /*
+   * Registration of a page that wants to be notified of a message type.
+   * @param type          The message type.
+   * @param pageURI       The URI of the page that will be opened.
+   * @param manifestURI   The webapp's manifest URI.
+   */
+  void registerPage(in DOMString type, in nsIURI pageURI, in nsIURI manifestURI);
+};
+
+[scriptable, uuid(002f0e82-91f0-41de-ad43-569a2b9d12df)]
+interface nsISystemMessagesWrapper: nsISupports
+{
+  /*
+   * Wrap a message and gives back any kind of object.
+   * @param message  The json blob to wrap.
+   */
+  jsval wrapMessage(in jsval message, in nsIDOMWindow window);
+};
+
+/*
+ * Implements an interface to allow specific message types to
+ * configure some behaviors
+ */
+[scriptable, uuid(a0e970f6-faa9-4605-89d6-fafae8b10a80)]
+interface nsISystemMessagesConfigurator: nsISupports
+{
+  /*
+   * Will be true if this type of system messages assumes/requires
+   * that the app will be brought to the front always.
+   */
+  readonly attribute boolean mustShowRunningApp;
+};