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Note: this will also be used by D3D11VideoDecoder in the future.

The old way of just checking D3D11Device->CheckFormatSupport lies about
whether the processor / enumerator really can support those profiles.
This cl makes a new checker which can create an enumerator and then
check the formats that way.

Change-Id: I9f25e633c161095410909afa3ba88ca4f2e09000
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1864349
Commit-Queue: Ted Meyer <tmathmeyer@chromium.org>
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Cr-Commit-Position: refs/heads/master@{#707537}