diff --git a/docshell/base/nsIDocShellContainer.idl b/docshell/base/nsIDocShellContainer.idl
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+++ b/docshell/base/nsIDocShellContainer.idl
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+/* -*- Mode: IDL; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * 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 the Mozilla browser.
+ * 
+ * The Initial Developer of the Original Code is Netscape
+ * Communications, Inc.  Portions created by Netscape are
+ * Copyright (C) 1999, Mozilla.  All Rights Reserved.
+ * 
+ * Contributor(s):
+ *   Travis Bogard <travis@netscape.com>
+ *   Steve Clark <buster@netscape.com>
+ */
+
+#include "nsISupports.idl"
+#include "nsIDocShell.idl"
+#include "nsIEnumerator.idl"
+
+
+/**
+ * The nsIDocShellContainer
+ */
+
+[scriptable, uuid(69E5DE04-7B8B-11d3-AF61-00A024FFC08C)]
+interface nsIDocShellContainer : nsISupports
+{
+	/*
+	The current number of DocShells which are immediate children of the 
+	current DocShell.
+	*/
+	attribute long childCount;
+
+	/*
+	Add a new child DocShell.  Adds to the end of the list.
+	*/
+	void AddChild(in nsIDocShell child);
+
+	/*
+	Removes a child DocShell.
+	*/
+	void RemoveChild(in nsIDocShell child);
+
+	/*
+	Enumerator to walk child list.
+	*/
+	readonly attribute nsIEnumerator childEnumerator;
+
+	/*
+	Return the child DocShell with the specified name
+	*/
+	nsIDocShell FindChildWithName(in wstring name);
+};
+