After setting cookie with an Apache Module shall I see the content in chrome?

I am writing an apache module, setting a cookie and reading it successfully.

Why I dont see this cookie in chrome dev tool under Application->Cookies->localhost (my apache is in localhost).

I am using those function for setting and getting:

apr_table_addn(r->err_headers_out, "Set-Cookie", cookie);
cookie = apr_table_get(r->headers_in, "Cookie");

thanks