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New versions don't have Done procs, allow null for release procs, and
the YUVA variation internally figures out the texture channels from
higher level inputs (formats + planar configuration).

Bug: skia:10632
Change-Id: Ifb49bcb2fce4edc88b0c4425f9031be37113fd81
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2537878Reviewed-by: Peng Huang <penghuang@chromium.org>
Commit-Queue: Brian Salomon <bsalomon@google.com>
Cr-Commit-Position: refs/heads/master@{#827791}