test/e2e/resources/console/resource-errors.html

<!DOCTYPE html>
<meta charset="utf-8">
<script>
  function performActions()
  {
      var image = document.createElement('img');
      image.onerror = step2;
      image.src = "unknown-scheme://foo";
  }

  function step2() {
    loadXHR();
    loadIframe();
  }

  function loadXHR()
  {
      var xhr = new XMLHttpRequest();
      xhr.open("GET","non-existent-xhr", false);
      xhr.send(null);
  }

  function loadIframe()
  {
      var iframe = document.createElement("iframe");
      iframe.src = "resource-errors-iframe.html";
      document.body.appendChild(iframe);
  }

  performActions();
</script>