fix this by always setting the real mime type on a mime info got from prefs. r=bzbarsky sr=darin a=asa git-svn-id: svn://10.0.0.236/trunk@150239 18797224-902f-48f8-a5cc-f745e15eee43
fix this by always setting the real mime type on a mime info got from prefs. r=bzbarsky sr=darin a=asa git-svn-id: svn://10.0.0.236/trunk@150239 18797224-902f-48f8-a5cc-f745e15eee43