This is possible thanks to SecondaryCommandBuffer.  Makes life easier
when debugging by not just showing resource type in the nodes, but
actual stream of commands recorded in each.

Bug: angleproject:3136
Change-Id: I125a32ec2966a55330e60930ca088d1a3673a8ba
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1538832
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>