Partially implemented to make it easier to debug.
Only debug group is supported for now.

Bug: angleproject:2634
Change-Id: I029dd4283790fb57a6964aad89c37d092e3378e5
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2433331
Commit-Queue: Le Hoang Quyen <le.hoang.q@gmail.com>
Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>