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<!doctype HTML>
<html>
<meta charset="utf8">
<title>Content Visibility: auto in the viewport (reference).</title>
<link rel="author" title="Vladimir Levin" href="mailto:vmpstr@chromium.org">
<style>
.border {
border: 1px solid black;
}
</style>
<div class=border>
Test passes if there is a border around this text.
</div>
</html>