Bug 1672842. Avoid using the postscript name to create the CTFontDescriptor. r=jfkthame
Bug 1672842. Avoid using the postscript name to create the CTFontDescriptor. r=jfkthame

Instead create at CTFont and get the descriptor from it.

Differential Revision: https://phabricator.services.mozilla.com/D95750

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/0db0e6a3f8f01d3060adeaaa0aa599b169811f24

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