chrome/browser/resources/options/chromeos/power_overlay.html

<div id="power-overlay" class="page" hidden>
  <div class="close-button"></div>
  <h1 i18n-content="powerOverlay"></h1>
  <div class="content-area">
    <table>
      <tr>
        <td class="option-name" i18n-content="batteryStatusLabel">
        </td>
        <td id="battery-status-value">
        </td>
      </tr>
    </table>
  </div>
  <div class="action-area">
    <div class="button-strip">
      <button id="power-confirm" class="default-button" type="submit"
          i18n-content="done">
      </button>
    </div>
  </div>
</div>