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chromium/third_party/blink/web_tests/fast/forms/autofocus-remove-before-focus.html 

<script>
testRunner.dumpAsText();

function runTest() {
    document.execCommand('justifyRight', null, true);
    document.body.innerHTML = 'PASS';
}
</script>
<body onload=runTest()>
<button autofocus>