diff -r 000000000000 -r 6474c204b198 js/src/vm/Value.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/js/src/vm/Value.cpp	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,21 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
+ * vim: set ts=8 sts=4 et sw=4 tw=99:
+ * 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 "js/Value.h"
+
+const jsval JSVAL_NULL  = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_NULL,      0));
+const jsval JSVAL_ZERO  = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_INT32,     0));
+const jsval JSVAL_ONE   = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_INT32,     1));
+const jsval JSVAL_FALSE = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_BOOLEAN,   false));
+const jsval JSVAL_TRUE  = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_BOOLEAN,   true));
+const jsval JSVAL_VOID  = IMPL_TO_JSVAL(BUILD_JSVAL(JSVAL_TAG_UNDEFINED, 0));
+
+namespace JS {
+
+const HandleValue NullHandleValue = HandleValue::fromMarkedLocation(&JSVAL_NULL);
+const HandleValue UndefinedHandleValue = HandleValue::fromMarkedLocation(&JSVAL_VOID);
+
+} // namespace JS