No need to error a fetch body stream if its request or response is stopped
Created attachment 427655 [details] Patch
<rdar://77457392>
Comment on attachment 427655 [details] Patch r=me
Committed r277028 (237341@main): <https://commits.webkit.org/237341@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 427655 [details].