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chromium/third_party/blink/web_tests/virtual/text-antialias/font-weight-600.html 

<!DOCTYPE HTML>
<html>
<head>
<style>
p {
    font-family: Arial, sans-serif;
    font-size:48px;
}

.weight600 {
    font-weight: 600;
}
</style>
</head>
<body>
<p>Text, normal weight.</p>
<p class=weight600>Bolder than normal.</p>
</body>
</html>