On a Dell XPS 13 (9333), I am running Ubuntu 15.04 and Google Chrome Stable and since yesterday after some updates, Google Chrome has gone all weird on me.
The Tab/Menu/URL bar and web pages have got really big. I have played with the zoom settings and set zoom to 50% and that has fixed the web page sizing, but Tab/Menu/URL bar is still massive.
I have tried a Reset Chrome, in the Settings menu, and also removing and reinstalling Chrome.
No issues with Firefox or other applications.