content/test/data/web_ui_mojo.html

<html>
<head>
  <script src="chrome://resources/js/mojo_bindings.js"></script>
  <script src="content/test/data/web_ui_test_mojo_bindings.mojom.js"></script>
  <script src="web_ui_mojo.js"></script>
</head>
<body>
  x
</body>
</html>