Remove sw::TaskEvents and sw::WaitGroup, replace this with sw::CountedEvent. See b/173784261 for details. Fixes: b/173784261 Change-Id: I21fb69c810558a1929bba5cc46f106d9d4e51c4b Reviewed-on: https://swiftshader-review.googlesource.com/c/SwiftShader/+/50628 Kokoro-Result: kokoro <noreply+kokoro@google.com> Reviewed-by: Chris Forbes <chrisforbes@google.com> Reviewed-by: Nicolas Capens <nicolascapens@google.com> Tested-by: Ben Clayton <bclayton@google.com> Presubmit-Ready: Ben Clayton <bclayton@google.com>
