mac: Remove OSX 10.11 font hack.

Previously, I added a hack to MatchNSFontFamily to never return the system
font on OSX 10.11, since skia had trouble rendering it. That problem has now
been fixed, so the hack can be removed.

BUG=524646

Review URL: https://codereview.chromium.org/1358253002

git-svn-id: svn://svn.chromium.org/blink/trunk@202657 bbb929c8-8fbe-4397-9dbb-9b2b20218538
1 file changed