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

<style include="settings-shared">
  #cellularRoamingToggle {
    display: flex;
    justify-content: center;
    min-height: var(--cr-section-two-line-min-height);
  }

  #cellularRoamingToggle:not([disabled]):hover {
    background-color: var(--cr-hover-background-color);
  }

  #cellularRoamingToggle:not([disabled]):active {
    background-color: var(--cr-active-background-color);
  }
</style>
<template is="dom-if"
    if="[[showPerNetworkAllowRoamingToggle_(isRoamingAllowedForNetwork_)]]">
    <network-config-toggle id="cellularRoamingToggle" class="settings-box" policy-on-left
        property="[[managedProperties.typeProperties.cellular.allowRoaming]]"
        label="$i18n{networkAllowDataRoaming}"
        sub-label="[[getRoamingDetails_(managedProperties.typeProperties.cellular.allowRoaming.*, prefs.cros.signed.data_roaming_enabled)]]"
        checked="{{isRoamingAllowedForNetwork_}}"
        disabled="[[isPerNetworkToggleDisabled_(managedProperties.typeProperties.cellular.allowRoaming.*, disabled, prefs.cros.signed.data_roaming_enabled)]]">
    </network-config-toggle>
</template>