• 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/60151122db4de10a2fb9d346eb9104a9cba99341
    Lee Salzman @moz-gfx
    Lee Salzman authored and moz-gfx committed Mar 11, 2020
    adc9717