This regressed in http://crrev.com/c/948782. It may have also
exposed a problem where our bots are not correctly using the
layers.

Bug: angleproject:2361
Change-Id: I764bb821b5bfd2571a4c43f9444dcef67ea65bc4
Reviewed-on: https://chromium-review.googlesource.com/954412Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Jamie Madill <jmadill@chromium.org>