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chromium/third_party/blink/web_tests/external/wpt/html/editing/dnd/selection/091.xhtml 

<?xml version="1.0" encoding="utf-8"?>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Scrolling during selection drag and drop to frame</title>
</head>
<frameset rows="50%, 50%">
<frame src="091-1.xhtml"/>
<frame src="091-2.xhtml"/>
</frameset>
</html>