According to <rdar://problem/17273654> we need to use _kCFNTimingDataFetchStart instead of _kCFNTimingDataTimingDataInit as the key for the reference start time for web timing data from CFNetwork. This is a partial fix for that bug.
Created attachment 232991 [details] Patch
Comment on attachment 232991 [details] Patch Clearing flags on attachment: 232991 Committed r169915: <http://trac.webkit.org/changeset/169915>
All reviewed patches have been landed. Closing bug.