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This CL only prints out the info in a test, so we could take
a look and wire them up in a follow-up.

Part of this CL will be reverted after we get the info.

This should only affect gl_unittests and should not turn any
bots red.

I believe this is the least intrusive way to gather what we need.

BUG=967860
TEST=bots
R=sunnyps@chromium.org

Change-Id: I216151660263a575a48542a2c21d914d0f12e3a7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1637863Reviewed-by: Sunny Sachanandani <sunnyps@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#664943}