구글플러스 로그인시 토스트창/팝업창 없애기 / Stop to google+ toast/notification sign-in popping up the message

if you sign_in gogole+ 

You can see the notification to the bottom.

The source of the notification

If you want to stop this

add in *.css

iframe[src^="https://apis.google.com/u/0/_/widget/oauthflow/toast"] {display: none;}