Squid auth with samba4 void with google chrome

i have succesfully integreted squid with samba4, with wpad.pac file all windows clients are configured to use proxy as default. But when google chrome pops us about login and pass, and if someone press double enter he/she is enter the web site, with out restriction. Google log in to samba4 auth with “NT%20AUTHORITY\ANONYMOUS%20LOGON” .

1378884595.193 249031 xxx.xxx.xxx.xxx TCP_MISS/200 6742 CONNECT ssl.google-analytics.com:443 NT%20AUTHORITY\ANONYMOUS%20LOGON DIRECT/xxx.xxx.xxx.xxx

How to prevent this action ?