GitLab

This CL merges acquire fences for primary plane and overlays so
that the updates happen at the same time. We could see artifacts
when they were out of sync, as the underlay strategy expects a
perfect fit under transparent layer. This CL makes sure that the
updates happen in sync.

Bug: 1144320, 1127984
Change-Id: I4b6bc776e0f3c2c8b0d6c4811245cc2cbcc3b9fa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2514465Reviewed-by: Sergey Ulanov <sergeyu@chromium.org>
Reviewed-by: kylechar <kylechar@chromium.org>
Commit-Queue: Emircan Uysaler <emircan@chromium.org>
Cr-Commit-Position: refs/heads/master@{#824202}