Vulkan: Destroy unused resources in a timely manner Deletion of garbage that's eligible for immediate cleanup is currently delayed until the next submission. Fix this by checking if garbage can be freed immediately and deleting it right away if it's not used. Some missing retain() calls needed to be added to semaphore operations in order to avoid freeing resources in use by a memory barrier. Based on a change by spang@chromium.org Bug: angleproject:4628 Change-Id: I034c24d7631c973b4546952f7718a0cd4114763f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2832002 Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>