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chromium/third_party/blink/web_tests/fast/forms/search/search-appearance-vertical-rl.html 

<!DOCTYPE html>
<meta name=fuzzy content="maxDifference=0-3; totalPixels=0-100">
<style>
input {
    writing-mode: vertical-rl;
}
</style>
<body>
<input id="in" type="search" value="foo" dir="rtl">

<script>
var input = document.getElementById('in');
// A cancel button should be showing on the top (left)
input.focus();
</script>
</body>