The dither check was incorrect. Fix the dither capture and add the missing rasterizer discard and polygon offset capture. Noticed when capturing the T-Rex replay. Bug: angleproject:5134 Change-Id: I5222625175ec7e078a9c0ad6c6fd3507db3a7769 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2449158 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Cody Northrop <cnorthrop@google.com> Reviewed-by: Courtney Goeltzenleuchter <courtneygo@google.com>
