The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/6323897a103b7f51983979498bae3018bf3d3b4e

commit 6323897a103b7f51983979498bae3018bf3d3b4e
Author: Robert Kroeger <rjkroege@chromium.org>
Date: Sat Jun 24 18:09:36 2017

ozone_demo has example of CheckOverlaySupport

ozone_demo can optionally use hardware overlay support to show a
moving solid colour rectangle. Add an example of using the
CheckOverlaySupport functionality in the ozone platform to show that
solid colour rectangle can in fact be placed in an overlay.

BUG= 735237 

added probes

Change-Id: Id84dd8beb01a2a5680a04916746d30f437dbe082
Reviewed-on: https://chromium-review.googlesource.com/541479
Commit-Queue: Robert Kroeger <rjkroege@chromium.org>
Reviewed-by: Daniel Nicoara <dnicoara@chromium.org>
Cr-Commit-Position: refs/heads/master@{#482157}
[modify] https://crrev.com/6323897a103b7f51983979498bae3018bf3d3b4e/ui/ozone/demo/surfaceless_gl_renderer.cc
[modify] https://crrev.com/6323897a103b7f51983979498bae3018bf3d3b4e/ui/ozone/demo/surfaceless_gl_renderer.h
[modify] https://crrev.com/6323897a103b7f51983979498bae3018bf3d3b4e/ui/ozone/platform/drm/gpu/drm_thread.cc
[modify] https://crrev.com/6323897a103b7f51983979498bae3018bf3d3b4e/ui/ozone/platform/drm/host/drm_overlay_manager.cc