tree ff2270d0babd76562d4c0407fdfaa5d436f26f2a
parent 09e61f72334c6fc4840560b56ff44761d7bf0e5d
author mtklein <mtklein@chromium.org> 1471985797 -0700
committer Commit bot <commit-bot@chromium.org> 1471985797 -0700

GN: extract optional() as a template and use for giflib-dependent code

BUG=skia:
GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=2270833003

Review-Url: https://codereview.chromium.org/2270833003