Expose AXObjectCache::treeData to the UI process.
<rdar://problem/91057915>
Created attachment 456160 [details] Patch
Created attachment 456388 [details] Patch
Committed r292264 (249162@main): <https://commits.webkit.org/249162@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 456388 [details].