Test for deferred clear vs robust init vs invalidate Bug: b/381284577 Change-Id: I15effe1f216523a51af83a154ad27d2921e52258 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6633791 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Yuxin Hu <yuxinhu@google.com>