chromium/chrome/test/data/safe_browsing/download_protection/navigation_observer/landing.html

<html>
  <head>
    <script>
      // Click on a link by id to start a test case.
      function clickLink(linkId) {
        var node = document.getElementById(linkId);
        if (node != null) {
          // Click and open link in the same tab.
          node.click();
        }
      }
    </script>
  </head>
  <body>
    <a id="download_on_landing_page" href="../signed.exe">
      Direct download from landing page
    </a><br>
  </body>
</html>