chromium/chrome/test/data/prerender/prerender_page.html

<html>
<!-- 
This test checks to make sure that a prerendered page is loaded.
-->
<head>
<title>Prerender Page</title>

<script>
var pageWasPrerendered = false;

// function DidPrerenderPass() {
//   pageWasPrerendered = true;
//   return true;
// }

// Make sure DidPrerenderPass() was called first.  Otherwise, the page was
// most likely reloaded instead of using the prerendered page.
// function DidDisplayPass() {
//   return pageWasPrerendered;
// }
</script>

</head>
<body>
  Text that is necessary for a FirstContentfulPaint metric to be recorded.
</body>
</html>