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chromium/third_party/blink/web_tests/fast/frames/frame-dead-region.html 

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Frameset//EN" "http://www.w3.org/TR/html4/frameset.dtd">
<html>
    <head>
        <title>Frameset Dead Region Test</title>
        <script>
            if (window.testRunner)
                testRunner.dumpAsText();
        </script>
    </head>
    <frameset cols="150,*">
        <frame src="resources/frame-dead-region-left.html">
        <frameset rows="90,0,0,0,0,*">
            <frame src="about:blank">
            <frame src="about:blank">
            <frame src="about:blank">
            <frame src="about:blank">
            <frame src="about:blank">
            <frame src="about:blank">
        </frameset>
    </frameset>
</html>