Codebase Browser
chromium
Go to App

chromium/chrome/test/data/chromedriver/page_with_redbox.html 

<!DOCTYPE html>
<html>
  <body style="overflow: hidden">
    <div id='box' style='width: 120px; height: 20px; background-color: red; position: absolute; left: 2000px; top: 3000px; border: 20px solid red; padding: 20px; margin: 20px'></div>
  </body>
</html>