chromium/chrome/browser/resources/chromeos/account_manager/account_manager_error.html

<!doctype html>
<html dir="$i18n{textdirection}" lang="$i18n{language}">
<head>
  <meta charset="utf-8">
  <!-- document title is set by account_manager_error_app.js -->
  <style>
    html,
    body {
      height: 100%;
      margin: 0;
      width: 100%;
    }
  </style>
</head>
<body>
  <account-manager-error></account-manager-error>
  <link rel="stylesheet" href="chrome://resources/css/text_defaults_md.css">
  <script type="module" src="account_manager_error_app.js"></script>
</body>
</html>