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+/* -*- 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);
+};