The ensure should already be triggered from the front-end.

Bug: angleproject:3539
Bug: angleproject:3887
Change-Id: Ic7ee10f9c767440e55befb929b414c0c894754c9
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2046051Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Cody Northrop <cnorthrop@google.com>
Commit-Queue: Jamie Madill <jmadill@chromium.org>