chromium/chrome/test/data/extensions/api_test/webnavigation/getFrame/prerender_new_tab.html

<!DOCTYPE html>
<html>
<head>
<script type="speculationrules">
{
  "prerender":[
    {"source": "list",
     "urls": ["c.html"],
     "target_hint": "_blank"}
  ]
}
</script>
<title>Prerender Test</title>
</head>
<body><a href="c.html" target="_blank" id="link">link</a></body>
</html>