
        Bug 1558926 - Part 4: Avoid display list updates for removed pipelines

bf1eceb

Depends on D60759

Differential Revision: https://phabricator.services.mozilla.com/D60760

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/1865e6d29dcfdcc1ec7adb5a5fa8fa9df183083b