File: vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Resources/config/form_csrf.xml

<?xml version="1.0" ?>

<container xmlns="http://symfony.com/schema/dic/services"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://symfony.com/schema/dic/services http://symfony.com/schema/dic/services/services-1.0.xsd">

    <services>
        <service id="form.csrf_provider" class="Symfony\Component\Form\Extension\Csrf\CsrfProvider\CsrfTokenManagerAdapter">
            <argument type="service" id="security.csrf.token_manager" />
            <deprecated>The "%service_id%" service is deprecated since Symfony 2.4 and will be removed in 3.0. Use the "security.csrf.token_manager" service instead.</deprecated>
        </service>

        <service id="form.type_extension.csrf" class="Symfony\Component\Form\Extension\Csrf\Type\FormTypeCsrfExtension">
            <tag name="form.type_extension" extended-type="Symfony\Component\Form\Extension\Core\Type\FormType" />
            <argument type="service" id="security.csrf.token_manager" />
            <argument>%form.type_extension.csrf.enabled%</argument>
            <argument>%form.type_extension.csrf.field_name%</argument>
            <argument type="service" id="translator.default" />
            <argument>%validator.translation_domain%</argument>
        </service>
    </services>
</container>