- QueryVk::queryCounter() and relevant utils are implemented for the
sake of Timestamp queries.
- TimeElapsed queries are implemented using two Timestamp queries.

Bug: angleproject:2885
Change-Id: Id181bd97f5a24e7e96b3ea1b819483227e64daf0
Reviewed-on: https://chromium-review.googlesource.com/c/1276806
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>