chromium/chrome/browser/resources/dev_ui/dev_ui_loader_error.html

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>DevUI DFM Loader</title>
  <style>
body {
  align-items: center;
  display: flex;
  flex-direction: column;
  font-family: sans, Arial, sans-serif;
  font-size: 93.75%;
  justify-content: flex-start;
}

#failure-message {
  display: inline-block;
  padding-top: 100px;
}

h1.heading {
  color: rgb(32, 33, 36);
  font-size: 1.6em;
  font-weight: normal;
  line-height: 1.25em;
  margin: 0 0 15px 0;
}

.list-header {
  color: #2B2B2B;
  line-height: 1.61em;
  margin: 0 8px 0 0;
}

ul.suggestions-list {
  margin-top: 0;
}

ul.suggestions-list li {
  color: #2B2B2B;
  line-height: 1.55;
}
  </style>
</head>
<body>
<div id="failure-message">
  <h1 class="heading">$i18n{h1}</h1>
  <p class="list-header">$i18n{p}</p>
  <ul class="suggestions-list">
    <li>$i18n{li-1}</li>
    <li>$i18n{li-2}</li>
  </ul>
</div>
</body>
</html>