On Thu, Nov 15, 2018 at 12:05 PM Timothy Hatcher <timothy@apple.com> wrote:
It wasn’t added for Tesla. But they did build with it disabled at the time I lasted worked on it. It was a frequent pain point to keep the build working when AX changes happened.
 

For the record, HAVE_ACCESSIBILITY has been introduced in the followoing commits.

https://trac.webkit.org/changeset/31986
https://trac.webkit.org/changeset/32042