Revert r237347 registered custom properties... https://bugs.webkit.org/show_bug.cgi?id=190039
Created attachment 353113 [details] Patch
Created attachment 353122 [details] Patch
Created attachment 353219 [details] Patch
Created attachment 353320 [details] Patch
<rdar://problem/45546003>
Comment on attachment 353320 [details] Patch Clearing flags on attachment: 353320 Committed r237570: <https://trac.webkit.org/changeset/237570>
All reviewed patches have been landed. Closing bug.