Skip UniformBufferTest.SimpleBufferChange on Mac NVIDIA GL BUG=angleproject:2287 Change-Id: I1a5895a9b5c173b221da6ac511c05d8b7d646a5d Reviewed-on: https://chromium-review.googlesource.com/833287 Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Yuly Novikov <ynovikov@chromium.org>