o) also return from GetFileTokenForPath when the base class implementation failed
with NS_ERROR_FILE_NOT_FOUND.
o) Do not return NS_ERROR_FILE_NOT_FOUND from the
base class impl if the file path is both relative and does not exist in the
mozilla directory.
o) Make sure to break out of the loop in the unix GetFileTokenForPath even if
ApendRelativePath fails
r+sr=bzbarsky a=asa
git-svn-id: svn://10.0.0.236/trunk@154411 18797224-902f-48f8-a5cc-f745e15eee43
162e887c63