Relanding nsDownloadManager.cpp of patch following landing of aviary branch git-svn-id: svn://10.0.0.236/trunk@166115 18797224-902f-48f8-a5cc-f745e15eee43
Relanding nsDownloadManager.cpp of patch following landing of aviary branch git-svn-id: svn://10.0.0.236/trunk@166115 18797224-902f-48f8-a5cc-f745e15eee43