chromium/ash/webui/personalization_app/resources/js/wallpaper/google_photos_albums_element.html

<style include="wallpaper common">
  :host {
    overflow: hidden;
  }

  iron-scroll-threshold,
  iron-list {
    width: 100%;
  }

</style>
<iron-scroll-threshold id="gridScrollThreshold" scroll-target="document"
    on-lower-threshold="onGridScrollThresholdReached_">
  <iron-list id="grid"
      items="[[albumsForDisplay_]]"
      as="album"
      grid
      scroll-target="document"
      aria-setsize$="[[albumsForDisplay_.length]]"
      role="list">
    <template>
      <wallpaper-grid-item
          aria-label$="[[getAlbumAriaLabel_(album)]]"
          aria-posinset$="[[getAlbumAriaIndex_(index)]]"
          class="album"
          index="[[index]]"
          is-google-photos
          on-wallpaper-grid-item-selected="onAlbumSelected_"
          primary-text="[[album.title]]"
          role="listitem"
          secondary-text="[[getSecondaryText_(album)]]"
          src="[[album.preview]]"
          tabindex$="[[tabIndex]]">
      </wallpaper-grid-item>
    </template>
  </iron-list>
</iron-scroll-threshold>