chrome/browser/resources/options/supervised_user_create_confirm.html

<div id="supervised-user-created" class="page" hidden>
  <div class="close-button"></div>
  <!-- Overlay for the confirmation after creating a supervised user. -->
  <div id="supervised-user-created-image"></div>
  <h1 id="supervised-user-created-title"></h1>
  <div id="supervised-user-created-text" class="content-area"></div>
  <div id="supervised-user-created-action-area" class="action-area button-strip">
    <button id="supervised-user-created-done"
        i18n-content="supervisedUserCreatedDone">
    </button>
    <button id="supervised-user-created-switch"></button>
  </div>
</div>