The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae

commit 2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae
Author: akaba <akaba@google.com>
Date: Tue Jul 31 16:24:24 2018

GetLatestInFlightSurface should not return null if fallback doesn't exist

GetLatestInFlightSurface will return null if fallback surface doesn't
exists which might happen after garbage collection, hence causing
jittering when resizing.
This CL refactor SurfaceManager::GetLatestInFlightSurface to return a
surface in the case when fallback is non-existent.

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel
Change-Id: Ib95b4ca3f8819b668022fd9b6942304b07cef340
Bug:  868447 
Reviewed-on: https://chromium-review.googlesource.com/1153088
Reviewed-by: Fady Samuel <fsamuel@chromium.org>
Reviewed-by: Saman Sami <samans@chromium.org>
Commit-Queue: Andre Kaba <akaba@google.com>
Cr-Commit-Position: refs/heads/master@{#579427}
[modify] https://crrev.com/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae/components/viz/service/display/surface_aggregator.cc
[modify] https://crrev.com/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae/components/viz/service/frame_sinks/surface_synchronization_unittest.cc
[modify] https://crrev.com/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae/components/viz/service/surfaces/surface.cc
[modify] https://crrev.com/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae/components/viz/service/surfaces/surface_manager.cc
[modify] https://crrev.com/2ff3de3fed70b8fbf9b2cf18d897e01514d2d7ae/components/viz/service/surfaces/surface_manager.h