Rename shouldSkipContent to isSkippedContentRoot to be consistent with isInertSubtreeRoot.
Pull request: https://github.com/WebKit/WebKit/pull/15631
Committed 265846@main (74467357ef90): <https://commits.webkit.org/265846@main> Reviewed commits have been landed. Closing PR #15631 and removing active labels.
<rdar://problem/111909887>