Not that I really see away around it, given the size and feature set of Chrome, but those build requirements are just crazy. It kinda throws the open source and "everyone can contribute" model out the window, if you can't afford a pretty insane workstation then you're going to have a bad time. I doubt that Firefox is better, I seem to remember that building Firefox and the VIA C3 processor years back as around half a…
I used to leave things like that running overnight in the old days.
All subsequent builds are just going to be compiling the one or two files you changed and then linking in the other 99.9%, which isn't going to take very long.