chromium/chrome/browser/resources/ash/settings/internet_page/network_always_on_vpn.html

<style include="settings-shared network-shared md-select">
  #lockdown {
    border-top: var(--cr-separator-line);
  }
</style>
<!-- Always-on VPN enable/disable toggle -->
<div class="property-box">
  <div class="start text-area" aria-hidden="true">
    <div class="label" id="alwaysOnVpnEnableLabel">
      $i18n{networkAlwaysOnVpnEnableLabel}
    </div>
    <div class="secondary" id="alwaysOnVpnEnableSublabel">
      $i18n{networkAlwaysOnVpnEnableSublabel}
    </div>
  </div>
  <cr-toggle id="alwaysOnVpnEnableToggle"
      disabled="[[shouldDisableAlwaysOnVpn_(networks)]]"
      checked="[[computeAlwaysOnVpnEnabled_(mode, networks)]]"
      on-change="onAlwaysOnEnableChanged_"
      aria-labelledby="alwaysOnVpnEnableLabel"
      aria-describedby="alwaysOnVpnEnableSublabel">
  </cr-toggle>
</div>
<!-- Always-on VPN options -->
<template is="dom-if" if="[[shouldShowAlwaysOnVpnOptions_(
        mode, networks)]]">
  <!-- Service selector -->
  <div class="property-box indented two-line">
    <div class="start text-area" aria-hidden="true">
      <div class="label" id="alwaysOnVpnServiceLabel">
        $i18n{networkAlwaysOnVpnService}
      </div>
    </div>
    <select id="alwaysOnVpnServiceSelect"
        class="md-select"
        on-change="onAlwaysOnVpnServiceChanged_"
        aria-labelledby="alwaysOnVpnServiceLabel">
      <template is="dom-repeat" items="[[getAlwaysOnVpnListOptions_(
                service, networks)]]">
        <option value="[[item.value]]" selected="[[item.selected]]">
          [[item.name]]
        </option>
      </template>
    </select>
  </div>
  <!-- Lockdown toggle -->
  <div id="lockdown" class="property-box indented two-line">
    <div class="start text-area" aria-hidden="true">
      <div class="label" id="alwaysOnVpnLockdownLabel">
        $i18n{networkAlwaysOnVpnLockdownLabel}
      </div>
      <div class="secondary" id="alwaysOnVpnLockdownSublabel">
        $i18n{networkAlwaysOnVpnLockdownSublabel}
      </div>
    </div>
    <cr-toggle id="alwaysOnVpnLockdownToggle"
        checked="[[computeAlwaysOnVpnLockdown_(mode)]]"
        on-change="onAlwaysOnVpnLockdownChanged_"
        aria-labelledby="alwaysOnVpnLockdownLabel"
        aria-describedby="alwaysOnVpnLockdownSublabel">
    </cr-toggle>
  </div>
</template>