Cleanup sampler completeness validation * Simplyfied control flow in TextureState::computeSamplerCompleteness * Used special rules for all depth and stencil formats instead of the filter support flag * Fixed DEPTH_STENCIL_TEXTURE_MODE affecting completeness of depth-only textures with REF_TO_TEXTURE compare mode * Skipped mipmap validation for multisample 2D array textures Bug: angleproject:2373 Change-Id: I0f9b6e7401fb85433f2ba4873f271055139bb17e Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4922392 Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com> Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>