r292539 added a use of m_serviceWorkerOpenWindowCompletionCallback not protected by ENABLE(SERVICE_WORKER)
Created attachment 456966 [details] [fast-cq] Build fix
Committed r292583 (249416@main): <https://commits.webkit.org/249416@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 456966 [details].
<rdar://problem/91456157>