Vulkan: Clean up CommandProcessor::queuePresent Right now queuePresent API returns VkResult in two places, via return value and SwapchainStatus structure. This CL makes it only return via SwapchainStatus::lastPresentResult so that two code path are the same. Bug: b/269524271 Change-Id: I7ab3c2bee08961a10718a2e5daa1c7f03e97e85d Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4257927 Commit-Queue: Charlie Lao <cclao@google.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Ian Elliott <ianelliott@google.com>