Capture/Replay: Also capture on postSubBuffer. Necessary to capture from Chrome. Bug: angleproject:3611 Change-Id: Ia9330e0c273e65adaa4171020d0aebb05e100260 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1752013 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Jamie Madill <jmadill@chromium.org>