chromium/ash/webui/personalization_app/resources/js/ambient/art_album_dialog_element.html

<style include="common cros-button-style">
  cr-dialog::part(dialog) {
    min-width: 288px;
    width: 288px;
  }
</style>
<cr-dialog id="dialog" show-on-attach>
  <div slot="body">$i18n{ambientModeLastArtAlbumMessage}</div>
  <div slot="button-container">
    <cr-button class="action-button primary" on-click="onClose_">
      $i18n{ambientModeArtAlbumDialogCloseButtonLabel}
    </cr-button>
  </div>
</cr-dialog>