Implements queries with the new command graph syntax. The T-Rex
capture benchmark uses queries so this fixes several errors.

Bug: angleproject:4029
Change-Id: Ia785f8e31257116aa3c75032dd66471b49926a78
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2021003
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Tobin Ehlis <tobine@google.com>