diff -r 000000000000 -r 6474c204b198 memory/mozalloc/msvc_throw_wrapper.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/memory/mozalloc/msvc_throw_wrapper.h	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,18 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: sw=4 ts=4 et :
+ */
+/* 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/. */
+
+#ifndef mozilla_msvc_throw_wrapper_h
+#define mozilla_msvc_throw_wrapper_h
+
+// Define our own _Throw because the Win2k CRT doesn't export it.
+#  ifdef _EXCEPTION_
+#    error "Unable to wrap _Throw(); CRT _Throw() already declared"
+#  endif
+#  define _Throw  mozilla_Throw
+#  include <exception>
+
+#endif  // ifndef mozilla_msvc_throw_wrapper_h