It's difficult to find this interface when I work bug 218692. This is just cleanup.
Created attachment 414817 [details] Patch
Sam, thank you for your review!
Oops. I forgot the tree is closed now...
<rdar://problem/71813225>
Tools/Scripts/svn-apply failed to apply attachment 414817 [details] to trunk. Please resolve the conflicts and upload a new patch.
Created attachment 415101 [details] Patch rebased
Committed r270297: <https://trac.webkit.org/changeset/270297> All reviewed patches have been landed. Closing bug and clearing flags on attachment 415101 [details].
Sam, Fujii-san, and Don, Thank you!