chromium/content/test/data/prerender/simple_prerender.html

<!DOCTYPE html>
<html>
<head>
<script type="speculationrules">
{
  "prerender":[
    {"source": "list",
     "urls": ["/empty.html"]}
  ]
}
</script>
<title>Prerender Test</title>
<!-- Make sure there is no zoom so that simulated clicks hit the right spot -->
<meta name="viewport" content="width=device-width,minimum-scale=1">
</head>
<body><a href="/empty.html" id="link">link</a></body>
</html>