Created a new WindowSurface/Display for MacOS/Vulkan, along with some GN changes to get it working. Bug: 1015454 Change-Id: I3f7a12f173795efe598856c702ce53b1e50831eb Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1880163 Commit-Queue: Jonah Ryan-Davis <jonahr@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>
