diff -r 000000000000 -r 6474c204b198 accessible/src/windows/msaa/XULTreeGridAccessibleWrap.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/accessible/src/windows/msaa/XULTreeGridAccessibleWrap.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,44 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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 "XULTreeGridAccessibleWrap.h"
+
+using namespace mozilla::a11y;
+
+////////////////////////////////////////////////////////////////////////////////
+// XULTreeGridAccessibleWrap
+////////////////////////////////////////////////////////////////////////////////
+
+NS_IMPL_ISUPPORTS_INHERITED0(XULTreeGridAccessibleWrap,
+                             XULTreeGridAccessible)
+
+IMPL_IUNKNOWN_INHERITED1(XULTreeGridAccessibleWrap,
+                         AccessibleWrap,
+                         ia2AccessibleTable)
+
+void
+XULTreeGridAccessibleWrap::Shutdown()
+{
+  ia2AccessibleTable::mTable = nullptr;
+  XULTreeGridAccessible::Shutdown();
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// XULTreeGridCellAccessibleWrap
+////////////////////////////////////////////////////////////////////////////////
+
+NS_IMPL_ISUPPORTS_INHERITED0(XULTreeGridCellAccessibleWrap,
+                             XULTreeGridCellAccessible)
+
+IMPL_IUNKNOWN_INHERITED1(XULTreeGridCellAccessibleWrap,
+                         AccessibleWrap,
+                         ia2AccessibleTableCell)
+
+void
+XULTreeGridCellAccessibleWrap::Shutdown()
+{
+  ia2AccessibleTableCell::mTableCell = nullptr;
+  XULTreeGridCellAccessible::Shutdown();
+}