LayoutTests/fast/css/variables/invalid-variable-value.html

<script>
internals.settings.setCSSVariablesEnabled(true);
</script>
<style>
div {
    -webkit-var-a: green;
    -webkit-var-a: 10px;
    color: -webkit-var(a);
}
</style>
<div>
This text should be black.
</div>