Instead of using the static variable in /gfx to maintain the state
of font download (eg. static BOOL gCheckJAFont = PR_FALSE;),
we use a nsFontPackageService::FontPackageHandled() API to allow
resetting of the font download.
/r=ftang; /sr=brendan
git-svn-id: svn://10.0.0.236/trunk@114638 18797224-902f-48f8-a5cc-f745e15eee43