chromium/chrome/browser/resources/ash/settings/controls/v2/settings_dropdown_v2.html

<style include="md-select cros-color-overrides">
  :host {
    align-items: center;
    display: flex;
  }

  cr-policy-pref-indicator {
    margin-inline-end: 32px;
  }
</style>

<template is="dom-if" if="[[isPrefEnforced]]" restamp>
  <cr-policy-pref-indicator pref="[[pref]]"></cr-policy-pref-indicator>
</template>

<select id="select"
    class="md-select"
    aria-label="[[ariaLabel]]"
    aria-description="[[ariaDescription]]"
    on-change="onChange_"
    disabled="[[isSelectDisabled_(disabled, options)]]">
  <template is="dom-repeat" items="[[options]]" as="option">
    <option value="[[option.value]]" hidden="[[option.hidden]]">
      [[option.label]]
    </option>
  </template>
</select>