use new font api -- aa and subpixel no longer deprecated

TBR=vmpstr

Bug: skia:2664
Change-Id: I736158e11434fdf561328e20fee6bef01ba43ae9
Reviewed-on: https://chromium-review.googlesource.com/c/1337827
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Florin Malita <fmalita@chromium.org>
Cr-Commit-Position: refs/heads/master@{#608837}
5 files changed