Raptor Engineering and the Talos II / ppc64 community have ported Chromium to ppc64le. All features of the browser appear to work at this time, including native v8 JIT, and patched builds exist for Debian  already.
As this work was originally done in a manner that can be upstreamed to Google, the port is broken up into a series of small patches. Work is ongoing to merge these patches into the upstream Chromium project. A full list of patches is available on the RCS Wiki ; all of these patches with the exception of the GCC specific patches will need to be applied to enable builds on ppc64le systems. Note that big endian systems will not yet work; Chromium currently makes a number of endianness assumptions throughout its codebase.
The patches currently apply to Chromium v70, and are continually maintained as part of the upstreaming efforts. Adding the patches and enabling builds for ppc64le will help provide a modern, fast browser for the nascent open computing community built on OpenPOWER products.
Thank you a lot, adding our chromium people to chime in :)
And the powerpc team as well.
I'm guessing these patches will break every chromium release, so I don't want to commit to maintaining this in the gentoo repository.
I would suggest creating an overlay and maintaining it there.
Let see the status on gerrit, probably a power9/talos overlay would be useful.