Disable the process cache when process-per-tab is disabled in the debug menu. The process cache is a process-swap-on-navigation optimization and process-swap-on-navigation is already disabled when process-per-tab is disabled. The process cache is not useful with such configuration and actually leads to crashes too.
<rdar://problem/57094837>
Created attachment 391174 [details] Patch
Comment on attachment 391174 [details] Patch r=me
The commit-queue encountered the following flaky tests while processing attachment 391174 [details]: editing/spelling/spellcheck-attribute.html bug 206178 (authors: g.czajkowski@samsung.com, mark.lam@apple.com, and rniwa@webkit.org) The commit-queue is continuing to process your patch.
Comment on attachment 391174 [details] Patch Clearing flags on attachment: 391174 Committed r256932: <https://trac.webkit.org/changeset/256932>
All reviewed patches have been landed. Closing bug.