• Bug 1612941 - add deinit hook to WR Compositor trait. r=gw 

    Differential Revision: https://phabricator.services.mozilla.com/D65591

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/bdf468af2e58f9dc651f8d062a3da90be8a412a5
    Lee Salzman @moz-gfx
    Lee Salzman authored and moz-gfx committed Mar 14, 2020
    9f2341a