isDisturbed should be moved to FetchBodyOwner. This will allow simplifying the handle of responses disturbed through their ReadableStream body property.
Created attachment 275086 [details] Patch
Created attachment 275088 [details] Patch
Created attachment 275271 [details] Patch for landing
Comment on attachment 275271 [details] Patch for landing Clearing flags on attachment: 275271 Committed r198890: <http://trac.webkit.org/changeset/198890>
All reviewed patches have been landed. Closing bug.