Abort pipeTo based on AbortSignal
Created attachment 406509 [details] Patch
Created attachment 406516 [details] Patch
<rdar://problem/67474381>
Created attachment 407276 [details] Rebasing
Committed r266177: <https://trac.webkit.org/changeset/266177> All reviewed patches have been landed. Closing bug and clearing flags on attachment 407276 [details].