After installation, you can launch the chrome, either from terminal or normal unity window. Last thing to keep in mind, that google-chrome uses environment variable to detect proxy from desktop-manager. If proxy variables are not setup properly, chrome won't work.
If nothing else works, you can launch chrome from command line and pass the proxy there
$ google-chrome--proxy-server="http=proxy.ncbs.res.in:3128;https=proxy.ncbs.res.in:3128;ftp=proxy.ncbs.res.in:3128"
You don't want to type so much everytime, just to launch a browser, so use a script.
These 3 commands will 1) download the script 2)make is executable 3) copy it to /usr/local/bin.
Now you can launch chrome from command line by typing chrome only. When using NCBS-Hotspot which does not have proxy, don't use this script but launch it using `google-chrome`.