switch to NS_ERROR_FILE_NOT_FOUND and update tests r=sayrer, sr=brendan git-svn-id: svn://10.0.0.236/trunk@227675 18797224-902f-48f8-a5cc-f745e15eee43
switch to NS_ERROR_FILE_NOT_FOUND and update tests r=sayrer, sr=brendan git-svn-id: svn://10.0.0.236/trunk@227675 18797224-902f-48f8-a5cc-f745e15eee43