Since Chromium 36, the font displayed on browser tabs as well as in menus is larger than normal. I'm not sure if this is intended. The font does not seem this big on Windows.
over to chromium team.
This might be caused by Aura-backed-by-GTK being used for the drawing, on Windows Aura is used.
This does not seem to be a problem any more and has not for a while. closing
With Chrome 35.0.1916.153 I have this issue: http://www.google.com/fonts/specimen/Roboto http://imgur.com/XrmAJlb i.e. the default “Normal 400” font weight looks heavier than “Ultra-Bold 900”.