Drop std::call_once() from RenderThemeIOS::cssValueToSystemColorMap() since this function is always called from the main thread.
Created attachment 402293 [details] Patch
Created attachment 402294 [details] Patch
Comment on attachment 402294 [details] Patch r=me
Comment on attachment 402294 [details] Patch Clearing flags on attachment: 402294 Committed r263278: <https://trac.webkit.org/changeset/263278>
All reviewed patches have been landed. Closing bug.
<rdar://problem/64539053>
<rdar://problem/64539051>