tree a10ee68faa09495fb35f22910b82f31d8169ee09
parent 49481e1000efd5fdef3f1e3ec54b602abc706273
author Jim Van Verth <jvanverth@google.com> 1573658068 -0500
committer Skia Commit-Bot <skia-commit-bot@chromium.org> 1573660142 +0000

Put check for MTLTextureUsageShaderRead in available block.

MTLTextureUsage is not available on all Metal versions, so we need to
check for that. Also made the asserts consistent in this file.

Bug: skia:9573
Change-Id: I1cbb69be9c7b59d10454dc158b0f28ab5f74bbcf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/254418
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Jim Van Verth <jvanverth@google.com>