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chromium/third_party/blink/web_tests/fast/frames/invalid-cols-rows-value-expected.html 

<!DOCTYPE html>
<frameset cols="0*, 50%" rows="50%, 0*">
<frame src="resources/red.html">
<frame src="resources/purple.html">
<frame src="resources/purple.html">
<frame src="resources/red.html">
</frameset>