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Per discussion on https://crrev.com/c/2527025 no decoder used by
Chrome requires this. Also, our current checks are incorrect while
our test data uses non-compliant streams... so just remove!

https://chromium-review.googlesource.com/c/chromium/src/+/2527025

R=wolenetz

Change-Id: Ie10199182f4dcae18ea221a14623040517605173
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2587688
Commit-Queue: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
Auto-Submit: Dale Curtis <dalecurtis@chromium.org>
Reviewed-by: Matthew Wolenetz <wolenetz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#836322}