As a quick update, I'm starting another push (small at first) to try to get some of the more downstream-invasive changes upstream. Starting with the build config generators, as downstream distros can only patch in the entire generated config which gets messy.
https://chromium-review.googlesource.com/c/chromium/src/+/3626304 https://chromium-review.googlesource.com/c/chromium/src/+/3627862 https://chromium-review.googlesource.com/c/chromium/src/+/3626305 Let's see how those three are received and plan from there...