GitLab

This is a reland of 5a3ffeb6

Original change's description:
> media/gpu/video_encode_accelerator_tests: Validates each temporal layer stream
>
> The test originally validates the entire bitstream. This CL
> enables the test to validate each temporal layer stream. For
> instance, when --num_temporal_layers=3, the test validates three
> streams, TL0, TL0+TL1 and TL0+TL1+TL2.
> BitstreamFileWriter and VideoFrameFileWriter ignore bitstreams
> and frames in upper layers than to be processed by them.
> VideoFrameFileWriter also writes a file with a different prefix
> from other VideoFrameFileWriter, so that multiple instances don't
> write to the same file names.
>
> Bug: b:174318867
> Test: video_encode_accelerator_tests --codec=vp9 --num_temporal_layers=3 w/o output_bitstream --output_images=all
> Change-Id: Idf2a1e4d2a50e11ca359435ec4495a43b61139f9
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2562801
> Reviewed-by: David Staessens <dstaessens@chromium.org>
> Commit-Queue: Hirokazu Honda <hiroh@chromium.org>
> Cr-Commit-Position: refs/heads/master@{#833103}

Bug: b:174318867
Change-Id: Ifd87576869aebab313933afa7c7c0f202b152e3a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2570476
Auto-Submit: Hirokazu Honda <hiroh@chromium.org>
Commit-Queue: David Staessens <dstaessens@chromium.org>
Reviewed-by: David Staessens <dstaessens@chromium.org>
Cr-Commit-Position: refs/heads/master@{#833572}