Backed out changeset 207c7cefa9db (bug 1757454) for causing WR bustages. CLOSED TREE
Backed out changeset 207c7cefa9db (bug 1757454) for causing WR bustages. CLOSED TREE

[ghsync] From https://hg.mozilla.org/mozilla-central/rev/9849c6e79fa392d28ee9483ac5c2d2c220bf7751

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