You should check the Product Availability Matrix for compatibility with Chrome (if it works in chrome it will work in Safari). I'm not sure with SP will provide the compatibility for 7.0. Have you checked the notes provided?
In terms of Netweaver version, by now you should be running 7.31 or 7.4 which have full compatibility. Upgrades have their uses, and an ECC on EhP2 is very outdated (EhP4 came out more then 5 years ago, we are currently on EhP7).