Remove up-mixing* and stereo2mono-down-mixing tests

Remove up-mixing* and stereo2mono-down-mixing tests

These tests are covered by AudioNode/audionode-channel-rules.html
which is a much more complete test of the mixing rules.

stereo2mono-down-mixing was testing that a stereo source downmixed to
mono by the destination doesn't crash.  This is also covered by
audionode-channel-rules which tests downmixing of any channel
arrangements to a mono destination.

BUG=693256
TEST=none

Review-Url: https://codereview.chromium.org/2702763002
Cr-Commit-Position: refs/heads/master@{#452982}
Committed: https://chromium.googlesource.com/chromium/src/+/bc8f880eb1ad53ca001981ebacd4569b91c61379

[Raymond Toy, 2017-02-22 23:13:18]

rtoy@chromium.org changed reviewers:
+ hongchan@chromium.org

[Raymond Toy, 2017-02-22 23:13:19]

PTAL

[hongchan, 2017-02-24 22:03:07]

lgtm

[Raymond Toy, 2017-02-24 22:04:53]

The CQ bit was checked by rtoy@chromium.org

[commit-bot: I haz the power, 2017-02-24 22:05:40]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.chromium.or...

[commit-bot: I haz the power, 2017-02-24 23:10:43]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1487973893643050, "parent_rev":
"3f6f704e1dd29f27151815af2b24e5da87711546", "commit_rev":
"bc8f880eb1ad53ca001981ebacd4569b91c61379"}

[commit-bot: I haz the power, 2017-02-24 23:11:24]

Description was changed from

==========
Remove up-mixing* and stereo2mono-down-mixing tests

These tests are covered by AudioNode/audionode-channel-rules.html
which is a much more complete test of the mixing rules.

stereo2mono-down-mixing was testing that a stereo source downmixed to
mono by the destination doesn't crash.  This is also covered by
audionode-channel-rules which tests downmixing of any channel
arrangements to a mono destination.

BUG=693256
TEST=none
==========

to

==========
Remove up-mixing* and stereo2mono-down-mixing tests

These tests are covered by AudioNode/audionode-channel-rules.html
which is a much more complete test of the mixing rules.

stereo2mono-down-mixing was testing that a stereo source downmixed to
mono by the destination doesn't crash.  This is also covered by
audionode-channel-rules which tests downmixing of any channel
arrangements to a mono destination.

BUG=693256
TEST=none

Review-Url: https://codereview.chromium.org/2702763002
Cr-Commit-Position: refs/heads/master@{#452982}
Committed:
https://chromium.googlesource.com/chromium/src/+/bc8f880eb1ad53ca001981ebacd4...
==========

[commit-bot: I haz the power, 2017-02-24 23:11:25]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/bc8f880eb1ad53ca001981ebacd4...