chromium/chrome/browser/resources/ash/settings/os_about_page/update_warning_dialog.html

<style include="settings-shared"></style>
<cr-dialog id="dialog" close-text="$i18n{close}" show-on-attach>
  <div slot="title">$i18n{aboutUpdateWarningTitle}</div>
  <div slot="body">
    [[warningMessage_]]
  </div>
  <div slot="button-container">
    <cr-button id="cancel" class="cancel-button"
        on-click="onCancelClick_">$i18n{cancel}</cr-button>
    <cr-button id="continue" class="action-button"
        on-click="onContinueClick_">
      $i18n{continue}
    </cr-button>
  </div>
</cr-dialog>