LayoutTests/fast/forms/isindex-placeholder.html

<style>
    #green-placeholder::-webkit-input-placeholder { color: green; }
</style>
<p>
    Test <tt>&lt;isindex></tt> placeholder styling.
</p>
The placeholder text should be gray:
<isindex placeholder="placeholder">
The placeholder text should be green:
<isindex id="green-placeholder" placeholder="placeholder">