On Mac, also check for a loca table before calling a font true type.
On Mac, also check for a loca table before calling a font true type.

Review URL: https://codereview.appspot.com/5720056

git-svn-id: e8541e15acce502a64c929015570ad1648e548cd@3311 2bbb7eff-a529-9590-31e7-b0007b416f81

mrobinson/skia,metajack/skia,Cue/skia,mrobinson/skia,mrobinson/skia,mrobinson/skia,metajack/skia,metajack/skia,Cue/skia,mrobinson/skia,metajack/skia,Cue/skia,Cue/skia