The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c81b200116ae49fac12bdeb5f420016e5f26bec6

commit c81b200116ae49fac12bdeb5f420016e5f26bec6
Author: Chris Blume <cblume@chromium.org>
Date: Wed Oct 17 02:07:56 2018

Add LOG(ERROR) when failing to find X function ptr

Vulkan on X11 loads two special function pointers. If we fail to load
these function pointers we should add a LOG(ERROR) in addition to the
existing destruction path.

BUG=850728

Cq-Include-Trybots: luci.chromium.try:android_optional_gpu_tests_rel;luci.chromium.try:linux_optional_gpu_tests_rel;luci.chromium.try:mac_optional_gpu_tests_rel;luci.chromium.try:win_optional_gpu_tests_rel
Change-Id: I310e8e75f268732590b21e7ce1e9c3896848fa04
Reviewed-on: https://chromium-review.googlesource.com/c/1284709
Reviewed-by: Eric Karl <ericrk@chromium.org>
Commit-Queue: Chris Blume <cblume@chromium.org>
Cr-Commit-Position: refs/heads/master@{#600242}
[modify] https://crrev.com/c81b200116ae49fac12bdeb5f420016e5f26bec6/gpu/vulkan/x/vulkan_implementation_x11.cc