Experimental Chromium features that repair prohibited names

Hi all,

I have two experiments ready to try in Canary/Dev channel, that work on
Chrome or Edge. I'm hoping to solve the problems with prohibited names,
where browsers both don't currently follow the ACCNAME spec, and also don't
have consistent AT output. Brett Lewis played with it for a week and didn't
notice any difference, which he suggested is partially because he tends to
navigate too quickly to hear most descriptions anyway. Here's a doc
explaining how to turn on the two experiments
<https://docs.google.com/document/d/1b9JwstXnkr3bgYeN3Cdb-QNTN5f0sHR6y68d3cuqxcQ/edit>,
and the thought process behind it. If you have time, I would love feedback.

Thanks!
Aaron