Make '-webkit-appearance' a parse-time alias of 'appearance'.
rdar://84112934
Created attachment 440831 [details] Patch
Created attachment 440861 [details] Patch
Created attachment 440944 [details] Patch
Comment on attachment 440944 [details] Patch r=mews
Committed r284098 (242926@main): <https://commits.webkit.org/242926@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 440944 [details].