* add support for a font list based on
1st: CSS
2nd: user prefs
3rd: fallbacks based on doc/user language
4th: any font that supports the char
* find the first font in the font list that supports a char
* within each text draw/measure operation bread the text into runs of text
that use the same font
r=louie.zhao@sun.com, sr=jst@netscape.com
git-svn-id: svn://10.0.0.236/trunk@136547 18797224-902f-48f8-a5cc-f745e15eee43
c225876fb2