Revert "Recover forbidding rule for adding masks to the root layer"
This reverts commit ad3649935d0a2a7c9b6e4f6fecc421c69e53c3ca.
Revert this for now so the builds made during the weekend are not so very broken. CCBUG:407375 CCBUG:407665
rempt | May 21 2019, 7:23 AM |