chromium/third_party/blink/web_tests/external/wpt/html/rendering/non-replaced-elements/the-page/body-margin-1c.html

<!doctype html>
<meta charset=utf-8>
<title>Test that body's leftmargin/rightmargin attributes have the right effect in standards mode</title>
<link rel=match href="body-margin-1-ref.html">
<iframe src="data:text/html,<!doctype html><body leftmargin='100' rightmargin='100'>100px left/right margins, default top/bottom margins</body>"></iframe>