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diff --git a/embed/mozilla/AutoEventQueue.h b/embed/mozilla/AutoEventQueue.h
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+/* 
+ * Copied from nsWindowWatcher.cpp.
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is mozilla.org code.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 2001
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *   Harshal Pradhan <keeda@hotpop.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK *****
+ *
+ * $Id$
+ */
+
+#ifndef AUTO_EVENT_QUEUE
+#define AUTO_EVENT_QUEUE
+
+#include <nsCOMPtr.h>
+#include <nsIEventQueue.h>
+#include <nsIEventQueueService.h>
+
+#ifdef XP_UNIX
+/* please see bugzilla.mozilla.org/show_bug.cgi?id=78421 for the eventual "right" fix for this */
+#define HAVE_LAME_APPSHELL
+#endif
+
+#ifdef HAVE_LAME_APPSHELL
+#include <nsIAppShell.h>
+#endif
+
+class AutoEventQueue {
+public:
+  AutoEventQueue();
+  ~AutoEventQueue();
+
+  nsresult Init();
+
+protected:
+  nsCOMPtr<nsIEventQueueService> mService;
+  nsCOMPtr<nsIEventQueue>        mQueue;
+#ifdef HAVE_LAME_APPSHELL
+  nsCOMPtr<nsIAppShell>          mAppShell;
+#endif
+};
+
+#endif