chrome/browser/resources/omnibox/ml/ml_calculator.html

<div class="header">Signals</div>
<div id="signals"></div>
<div class="header-row">
  <div class="header">Score</div>
  <div id="score"></div>
</div>
<div class="button-row">
  <span id="version">Version </span>
  <div class="buttons">
    <button id="copy">Copy</button>
    <button id="clear">Clear</button>
  </div>
</div>