Add nameFrom: heading tests once the AccName change is reviewed
Write WPT label tests for ARIA/AccName "nameFrom: heading"
ARIA: https://github.com/w3c/aria/pull/1860 AccName: https://github.com/w3c/accname/issues/182
Circular process: I needed to file this WPT issue in order to merge https://github.com/w3c/aria/pull/1860 but we can't write this test until the related AccName change https://github.com/w3c/accname/issues/182 is reviewed or lands. Heh.
ARIA Spec PR #1860 is approved. AccName Issue #182 is still outstanding.
Implementations mostly unblocked now, so we can proceed with this initial set of tests.
AccName PR is now ~~pending~~ approved:
- https://github.com/w3c/accname/pull/229
HTML-AAM change is coming too.
- w3c/html-aam/pull/529