We can't use the existing graphviz gstbin dump facilities since the harness is not a bin.
Pull request: https://github.com/WebKit/WebKit/pull/10360
Committed 260670@main (b646f7463534): <https://commits.webkit.org/260670@main> Reviewed commits have been landed. Closing PR #10360 and removing active labels.
<rdar://problem/105771731>