<!DOCTYPE html>
<html>
<body>
<p>This tests that the AutoFill button does not render in a read only field. It can only be tested in the test tool.</p>
<input type="password" id="password" placeholder="read only" readonly autofocus>
<script>
if (window.internals)
    internals.setShowAutoFillButton(document.getElementById("password"), "Credentials");
</script>
</body>
</html>