The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/c388c2369390f7524f080f727fa0b518a421e816

commit c388c2369390f7524f080f727fa0b518a421e816
Author: flim <flim@chromium.org>
Date: Thu Aug 10 05:36:42 2017

Set discrete layout for all formats if > 8 channel

If an input file is >8 channels, set it to discrete layout such that if a Web Audio renderer is attached, it is able to access all individual channels. If a Web Audio renderer is not attached, then rendering should fail.

Bug:  748150 
Cq-Include-Trybots: master.tryserver.chromium.android:android_optional_gpu_tests_rel;master.tryserver.chromium.linux:linux_optional_gpu_tests_rel;master.tryserver.chromium.mac:mac_optional_gpu_tests_rel;master.tryserver.chromium.win:win_optional_gpu_tests_rel
Change-Id: Ic37c6abd8a45be4b4949ad2c7e71cf0cfa3c63b6
Reviewed-on: https://chromium-review.googlesource.com/606678
Reviewed-by: Dale Curtis <dalecurtis@chromium.org>
Commit-Queue: Felicia Lim <flim@chromium.org>
Cr-Commit-Position: refs/heads/master@{#493285}
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/audio/clockless_audio_sink.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/audio/clockless_audio_sink.h
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/ffmpeg/ffmpeg_common.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/ffmpeg/ffmpeg_common_unittest.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/formats/webm/webm_audio_client.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/renderers/audio_renderer_impl.cc
[add] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/test/data/9ch.wav
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/test/pipeline_integration_test.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/test/pipeline_integration_test_base.cc
[modify] https://crrev.com/c388c2369390f7524f080f727fa0b518a421e816/media/test/pipeline_integration_test_base.h