This reverts commit 88fe84b7fbcb8dffe07b98d21d8a11572259c0d0.
Reason for revert: Downstream project isn't updated to the latest libvpx roll yet, thus some tests are broken.
Original change's description:
> VP9 encoder: handle disabled layers correctly
>
> Now vp9 screenshare would enable new layers as soon as requested and will
> force all spatial layers present on the next frame, even if they should be
> dropped because of frame-rate limiting.
>
> This might cause frame-rate liming to be exceeded if layer is toggling on
> and off very often, but this situation is bad itself. E.g. in realtime video
> it will cause too many key-frames.
>
> Now SvcRateAllocator and VP9EncoderImpl are aware that there may be some skipped
> layers before the first enabled. Key-frames and ss_info triggering logic is also
> updated.
>
> Bug: webrtc:10977
> Change-Id: Ie2555210c0368a1d3c51ddf6670d0052e6d679de
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/153483
> Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
> Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
> Cr-Commit-Position: refs/heads/master@{#29296}
TBR=ilnik@webrtc.org,ssilkin@webrtc.org
Change-Id: If33886a5f8a0c3b33168dcadfe45c11a6f4387c1
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: webrtc:10977
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/154354
Reviewed-by: Ilya Nikolaevskiy <ilnik@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29299}
90d6efbd4e