Remove reliance on VideoToolbox frame ordering.

It seems that VideoToolbox occasionally reorders frames (in my testing, the fourth one keeps appearing third, and then there are a few more random swaps that stop by around frame 16). This CL makes that a non-fatal error.

BUG=133828

Review URL: https://codereview.chromium.org/753713002

Cr-Commit-Position: refs/heads/master@{#305944}
2 files changed