Revert "MSE: Log when MP4 keyframe-ness mismatches the compressed media"

This reverts commit 61697367404dc4c7033e389556f01a652f2b6516.

Reason for revert: crbug.com/867520

Original change's description:
> MSE: Log when MP4 keyframe-ness mismatches the compressed media
> 
> Logs to chrome://media-internals when the container's keyframe metadata
> for a frame mismatches the contents of that frame (if the latter was
> determined by the respective bitstream converter's Analyze()
> implementation, of whom only AVC currently does any keyframe analysis).
> 
> BUG=860420,584384
> TEST=Repro crbug 860420 shows logs, new MP4StreamParserTest.AVC_Key* and media
> 
> Change-Id: Ic87eab8726ad76b36b569df08ab2212b267008c2
> Reviewed-on: https://chromium-review.googlesource.com/1149153
> Reviewed-by: Dan Sanders <sandersd@chromium.org>
> Commit-Queue: Matthew Wolenetz <wolenetz@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#577751}

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

Change-Id: I8437af99f24bf04910ad56931a9e91f960a59469
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 860420, 584384
Reviewed-on: https://chromium-review.googlesource.com/1150243
Reviewed-by: Zhenyao Mo <zmo@chromium.org>
Commit-Queue: Zhenyao Mo <zmo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#577968}
7 files changed