Calling XMLHttpRequest.abort() should destroy the responseText.
Created attachment 39958 [details] patch
Comment on attachment 39958 [details] patch As discussed on IRC, this re-breaks <rdar://problem/5766352> (status shouldn't be reset). Maybe it's OK, maybe not. ChangeLog should explain why. Marking r-, so that this doesn't get landed without a deeper investigation.
Created attachment 39961 [details] patch [take 2]
Comment on attachment 39961 [details] patch [take 2] + status text are kept around.. Two periods here. r=me
Fix landed in r48658.
This was tracked by <rdar://problem/5301430>.