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chromium/third_party/blink/web_tests/external/wpt/css/css-display/display-contents-oof-001.html 

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS Display: display:contents works on out-of-flow positioned elements</title>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:[email protected]">
<link rel="help" href="https://drafts.csswg.org/css-display-3/#valdef-display-contents">
<link rel="match" href="display-contents-pass-no-red-ref.html">
<style>
  div {
    display: contents;
    position: absolute;
    right: 0;
    background: red;
  }
</style>
<p>You should see the word PASS and no red below.</p>
<div>P<span>A</span>S<span>S</span></div>