Mihai Alexandru Michis @moz-gfx
Backed out changeset f3b490c076d6 (bug 1602643) for causing bustages …
8b4f985 
…regarding CompositorKindChanged

CLOSED TREE

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/52234324a69eb012bac0b0897a66b754f416e413