Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/http/tests/devtools/extensions/resources/subframe.html 

<html>
<head>
<link rel="stylesheet" href="audits-style1.css" type="text/css">
<script type="application/x-javascript" src="test-script.js"></script>
</head>
<body>
<img src="abe.png">
<div id="test-div" class="test"></div>
</body>
</html>