diff -r 000000000000 -r 6474c204b198 netwerk/base/public/nsIRequestObserverProxy.idl
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/netwerk/base/public/nsIRequestObserverProxy.idl	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,31 @@
+/* -*- 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 "nsIRequestObserver.idl"
+
+interface nsIEventTarget;
+
+/**
+ * A request observer proxy is used to ship data over to another thread
+ * specified by the thread's dispatch target. The "true" request observer's
+ * methods are invoked on the other thread.
+ *
+ * This interface only provides the initialization needed after construction.
+ * Otherwise, these objects are used simply as nsIRequestObserver's.
+ */
+[scriptable, uuid(c2b06151-1bf8-4eef-aea9-1532f12f5a10)]
+interface nsIRequestObserverProxy : nsIRequestObserver
+{
+    /**
+     * Initializes an nsIRequestObserverProxy.
+     *
+     * @param observer - receives observer notifications on the main thread
+     * @param context  - the context argument that will be passed to OnStopRequest
+     *                   and OnStartRequest. This has to be stored permanently on
+     *                   initialization because it sometimes can't be
+     *                   AddRef/Release'd off-main-thread.
+     */
+    void init(in nsIRequestObserver observer, in nsISupports context);
+};