Comment 22 for bug 1687019

Confirm that as well with clean install of Ubuntu gnome 17.04 yesterday, but maybe can give little support...
Before I decided to install I tried via Live-USB Stick and also connected to my google account.
Worked like a charm! Login-Screen that opened from Google was the old one!
After I installed ubuntu and wanted to creat again it didnt work again and ubuntu offered me new login screen.
I did a quick web search and found an interesting information here:
https://support.google.com/accounts/answer/7338427?co=GENIE.Platform%3DDesktop&hl=en

See the following:

You might still see the old sign-in page in these cases:
You use an older version of a browser
You've turned off JavaScript