I doubt that will turn out to be technically feasible in the long run. There's no bug team working on Chromium that isn't Google Chrome developers, AFAIK.
It raises the question of how 'Open Source' Open Source can be if it is tightly controlled by companies who constantly make compatibility breaking 'improvements' and 'architectural changes' that funnel end users and developers through their hardware, app stores and onto their cloud storage.
What browser should it be then? Rekonq, Konqueror?
It appears that the Big Three would prefer desktop Linux to wither and die, or at least not go mainstream, or is just by imagination?
Is Chrome actually a Chromium with Google customizations, in the sense that Chromium can keep NPAPI whilst Google removes it for its own distribution?