Hi Nolan,
Yes, we did the infrastructure work to get the browser content exposed to the ATK tree, but haven't implemented very many of the methods or even role mappings. You should be able to tab to links and buttons. You can't read static text with Orca, but if you use an accessibility debug tool you can see that it's there.
To enable it, just run Chrome with the --force-renderer-accessibility flag.
- Dominic