The bazaar certainly exists for the Linux kernel insomuch that this can and does happen (partly as a result of the fact many companies contribute but none control it). For go it does not, for chromium it does not seem to either.
It is tough for a company with internal aims and pressure to adhere to that kind of model for sure.
And it is good you have been honest about your approach prior to this in that no contributions were taken but now it is a matter of whether or not a non Googler has the opportunity to make such a change, in accordance with your policies.
But obviously as a hobbyist with limited free time I am understandably cautious as to where I put my effort.
Honestly on a personal level it is probably no loss on fuschia's part, I am a minor contributor at best, but the general point stands.