Note: This trace is longer than most at 100 frames.
This is to help get more accurate data on how transform
feedback is behaving. It also allows us the opportunity
to trim to smaller sections if we wish, and get more
reliable results on unstable systems.

Test: angle_perftests --gtest_filter="*manhattan_31*"
Bug: angleproject:5589
Bug: angleproject:5591
Change-Id: I76db8a56832d04ea4d335bd81ff98ba1679add5f
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2659850Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Commit-Queue: Cody Northrop <cnorthrop@google.com>