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This reverts commit b930822c.

Reason for revert: Causing build failures due to conflict with https://chromium-review.googlesource.com/c/chromium/src/+/2364075

See, e.g., https://ci.chromium.org/p/chromium/builders/try/linux-libfuzzer-asan-rel/538575?

Original change's description:
> [webcodecs] Implement Audio/VideoDecoder error callback.
> 
> This is implemented in terms of an |is_closed_| state, which prevents
> reentrancy during shutdown.
> 
> Bug: 1045247
> Change-Id: I69e8bd095979f6571fbe95b298f91166b61dc9f3
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2363998
> Commit-Queue: Dan Sanders <sandersd@chromium.org>
> Reviewed-by: Chrome Cunningham <chcunningham@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#800282}

TBR=sandersd@chromium.org,chcunningham@chromium.org

Change-Id: Ibff1740b70035b8242c15314cd760976d5a1efc7
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1045247
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2368456Reviewed-by: Matt Menke <mmenke@chromium.org>
Commit-Queue: Matt Menke <mmenke@chromium.org>
Cr-Commit-Position: refs/heads/master@{#800368}