The commit added some code that depends on variables defined inside SERVICE_WORKER. Not sure if there is something else in the patch we should protect even if it compiles just avoiding the m_swServers.
Created attachment 389340 [details] Patch
Comment on attachment 389340 [details] Patch Clearing flags on attachment: 389340 Committed r255498: <https://trac.webkit.org/changeset/255498>
All reviewed patches have been landed. Closing bug.
<rdar://problem/59062666>