Bodies might not be available to JS but might be sent to other web pages through Service workers.
Created attachment 332188 [details] Patch
<rdar://problem/36290628>
Created attachment 332197 [details] Patch
Comment on attachment 332197 [details] Patch Clearing flags on attachment: 332197 Committed r227581: <https://trac.webkit.org/changeset/227581>
All reviewed patches have been landed. Closing bug.