Hello,
I am a RPI developer and I looked on the chromium project that u posted.
I am not familiar with this JavaCEF but I see it is compiled for bsd. doesn;t it work by default in a debian/arch image for RPI?
In case it needs recompiled, it means it also needs code to adapted to the platform, and this depends on the exact variant of RPI you are wanting to use and the OS.
Anyway, I am looking forward to share ideas and find out more on the project,
Gus