Avoid initializing RenderTheme singleton unnecessarily in the UIProcess.
Created attachment 402326 [details] Patch
Comment on attachment 402326 [details] Patch Great! R=me.
Committed r263293: <https://trac.webkit.org/changeset/263293> All reviewed patches have been landed. Closing bug and clearing flags on attachment 402326 [details].
<rdar://problem/64547799>