Merge M57: "Always return CHANNEL_LAYOUT_UNSUPPORTED for unsupported layouts."

Merge M57: "Always return CHANNEL_LAYOUT_UNSUPPORTED for unsupported layouts."

The old code would sometimes return CHANNEL_LAYOUT_NONE which we
don't handle fallback to guessing the layout for. Instead always
return CHANNEL_LAYOUT_UNSUPPORTED so that we will properly attempt
to guess the channel layout based on channel count.

This is a speculative fix for broken audio on Traktor 2 Audio.

BUG=651172
TEST=none
CQ_INCLUDE_TRYBOTS=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

Review-Url: https://codereview.chromium.org/2687873006
Cr-Commit-Position: refs/heads/master@{#449831}
(cherry picked from commit f062c42d082ebf9c2f2e39ac6683f7755d232ac2)

Review-Url: https://codereview.chromium.org/2699463002 .
Cr-Commit-Position: refs/branch-heads/2987@{#505}
Cr-Branched-From: ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed: https://chromium.googlesource.com/chromium/src/+/d37b8a11a391cc19ff7f9caac521fc1408d73218

[DaleCurtis, 2017-02-14 19:50:12]

Description was changed from

==========
Merge M57: "Always return CHANNEL_LAYOUT_UNSUPPORTED for unsupported layouts."

The old code would sometimes return CHANNEL_LAYOUT_NONE which we
don't handle fallback to guessing the layout for. Instead always
return CHANNEL_LAYOUT_UNSUPPORTED so that we will properly attempt
to guess the channel layout based on channel count.

This is a speculative fix for broken audio on Traktor 2 Audio.

BUG=651172
TEST=none
CQ_INCLUDE_TRYBOTS=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

Review-Url: https://codereview.chromium.org/2687873006
Cr-Commit-Position: refs/heads/master@{#449831}
(cherry picked from commit f062c42d082ebf9c2f2e39ac6683f7755d232ac2)
==========

to

==========
Merge M57: "Always return CHANNEL_LAYOUT_UNSUPPORTED for unsupported layouts."

The old code would sometimes return CHANNEL_LAYOUT_NONE which we
don't handle fallback to guessing the layout for. Instead always
return CHANNEL_LAYOUT_UNSUPPORTED so that we will properly attempt
to guess the channel layout based on channel count.

This is a speculative fix for broken audio on Traktor 2 Audio.

BUG=651172
TEST=none
CQ_INCLUDE_TRYBOTS=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

Review-Url: https://codereview.chromium.org/2687873006
Cr-Commit-Position: refs/heads/master@{#449831}
(cherry picked from commit f062c42d082ebf9c2f2e39ac6683f7755d232ac2)

Review-Url: https://codereview.chromium.org/2699463002 .
Cr-Commit-Position: refs/branch-heads/2987@{#505}
Cr-Branched-From:
ad51088c0e8776e8dcd963dbe752c4035ba6dab6-refs/heads/master@{#444943}
Committed:
https://chromium.googlesource.com/chromium/src/+/d37b8a11a391cc19ff7f9caac521...
==========

[DaleCurtis, 2017-02-14 19:50:13]

Committed patchset #1 (id:1) manually as
d37b8a11a391cc19ff7f9caac521fc1408d73218 (tree was closed).