Somebody said something about Transgaming, so I tried adding an IsTransgaming function to Wine:
https://gist.github.com/achurch/3d01...1637018f076ecd
This lets the launcher start up (so the libcef code is in fact still live), but once you actually log in you get that "no service account" message. I wonder if IsTransgaming makes the launcher think it's running on a Mac, so the server checks for a Mac service account?
In any case, this still only works on the 32-bit binary, so however useful it is, it's only good for another couple of months - beyond that we need a proper fix to Wine's mshtml.