Add test for detecting locally installed fonts.
Add test for detecting locally installed fonts.

ttamminen/fontfaceobserver,bramstein/fontfaceobserver,kevinrodbe/fontfaceobserver,iksi/fontfaceobserver,bramstein/fontfaceobserver,matuzo/fontfaceobserver,ttamminen/fontfaceobserver,kevinrodbe/fontfaceobserver,matuzo/fontfaceobserver,iksi/fontfaceobserver