I did some tests about month ago, to try if it is possible at all.
I run a docker image of Ubuntu 16.04 aarch64, stopped Kodi, started X server with fbturbo driver, and I managed to launch Chromium Browser and open a webpage.
So it is possible, but needs a lot of work, and I could need a help with developing Chromium as an addon to Libreelec for ARM boards. I will have more time on September and will try to bring Chromium to ARM/aarch64. Now I am too busy and do nothing about it.
But it could be great on 2GB RAM devices to see Chromium
lukasz92 Don't waste your time:
Chromium will be integrated directly in Kodi through Chromium embedded framework:
GitHub - AlwinEsch/web.browser.chromium: Google Chromium based web browser for Kodi
It's already working very nice but still WIP.