CEF requires C++11 and thus removed the OVERRIDE macro, requires using
nullptr instead of NULL.
Version 95 removed some settings:
https://bitbucket.org/chromiumembedded/cef/issues/2820/remove-cefbrowsersettings

Consolidate the general, platform-agnostic part of the main()/WinMain()
in static FCHost::main() function to avoid code duplication.