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chromium/content/test/data/find_in_page_simple_frame.html 

<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no" />
<body>
  this frame contains a result.
  and another result.
  and another result.
</body>
</html>