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chromium/third_party/blink/web_tests/fast/replaced/007.html 

<html>
<div style="text-align:center">
This should be centered. <iframe width=300 height=150 src="resources/007-sub.html"></iframe><br>
This should be centered. <object width=300 height=150 type="text/html" data="resources/007-sub.html"></object><br>
</div>
</html>