Enable OpenType Variable Fonts by default

Intent to ship approved in:
https://groups.google.com/a/chromium.org/forum/#!topic/blink-dev/AzphlHk8orw

Bug: 669453
Change-Id: I49fcb9d302793f30bd168840f36440ef7a5f19a8
Reviewed-on: https://chromium-review.googlesource.com/602239
Reviewed-by: Chris Harrelson <chrishtr@chromium.org>
Reviewed-by: Ben Wagner <bungeman@chromium.org>
Commit-Queue: Dominik Röttsches <drott@chromium.org>
Cr-Commit-Position: refs/heads/master@{#492082}
3 files changed