absoluteTextRects() is a static function on RenderObject, so just use that.
<rdar://problem/113239175>
Pull request: https://github.com/WebKit/WebKit/pull/16300
Committed 266512@main (f3a7c01df2b5): <https://commits.webkit.org/266512@main> Reviewed commits have been landed. Closing PR #16300 and removing active labels.