Bug 1685236 - Add an autorelease pool in determine_font_smoothing_mode. r=jrmuizel
Bug 1685236 - Add an autorelease pool in determine_font_smoothing_mode. r=jrmuizel

Differential Revision: https://phabricator.services.mozilla.com/D100854

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/cab720b743a2473f9f0a958ffd05b9e252a7bc20

servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender,servo/webrender