These were previously erroneously marked as flakily crashing in bug 74746, but according to the flakiness dashboard they only occasionally timeout, never crash, and usually pass. See http://test-results.appspot.com/dashboards/flakiness_dashboard.html#tests=http%2Ftests%2Ffilesystem%2Fworkers%2Fresolve-url.html%2Chttp%2Ftests%2Ffilesystem%2Fworkers%2Fresolve-url-sync.html
These don't appear to be failing, removed TestExpecations entries in http://trac.webkit.org/changeset/129025