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chromium/third_party/blink/web_tests/virtual/text-antialias/wide-preformatted.html 

<html>
  <style>body { overflow:hidden; }
  </style><body><!-- 2^16 + 1 long line --><pre><script>
var text="PASS if you can see this-"
while (text.length <= 65536)
{
    text += text.length;
    text += "abcdefghijklmn pqrstuvwxyz"
}
document.write(text);</script></pre></body></html>