enable SK_FONTHOST_USES_FONTMGR for mac and win. linux fontmgr not ready

BUG=

Review URL: https://codereview.chromium.org/22406004

git-svn-id: http://skia.googlecode.com/svn/trunk@10605 2bbb7eff-a529-9590-31e7-b0007b416f81
1 file changed