Once stopped, it is no longer needed to keep a ref as the DOMCache is becoming a no-op.
Created attachment 351983 [details] Patch
Comment on attachment 351983 [details] Patch What prevents stop() from being called multiple times?
Created attachment 352059 [details] Patch
Comment on attachment 352059 [details] Patch Clearing flags on attachment: 352059 Committed r237070: <https://trac.webkit.org/changeset/237070>
All reviewed patches have been landed. Closing bug.
<rdar://problem/45229381>