chromium/ash/webui/scanning/resources/scanner_select.html

<style include="scanning-shared">
</style>
<scan-settings-section>
  <span id="scannerLabel" slot="label" aria-hidden="true">
    [[i18n('scannerDropdownLabel')]]
  </span>
  <div slot="settings">
    <select id="scannerSelect" class="md-select"
        value="{{selectedScannerId::change}}"
        disabled="[[disabled]]" aria-labelledby="scannerLabel">
      <template is="dom-repeat" items="[[scanners]]" as="scanner">
        <option value="[[getTokenAsString(scanner)]]">
          [[getScannerDisplayName(scanner)]]
        </option>
      </template>
    </select>
  </div>
</scan-settings-section>