Chrome has gone too large after update ubuntu 14.04 ..?

For me the following worked:

google-chrome --high-dpi-support=1 --force-device-scale-factor=1

make sure you kill all running instances of google chrome, otherwise it will just open another (broken) window ignoring the command line parameters

solution is to add flag --force-device-scale-factor in the file /usr/bin/chromium-browser or in /usr/bin/google-chrome

For solving error in chromium browser, I added the following line

CHROMIUM_FLAGS="$CHROMIUM_FLAGS --force-device-scale-factor=1"

after the CHROMIUM_FLAGS definition in the script "/usr/bin/chromium-browser", ( for me it was line 185 )

for /usr/bin/google-chrome you should add the same parameter but in other way, ( sorry on my side the bug was only on chromium )