[Chromecast] Fix unit test failures due to underflow.

[Chromecast] Fix unit test failures due to underflow.

- Return empty RenderingDelay from StreamMixerAlsaInputImpl when
  underflowing.
- Fix expected value in MultizoneBackendTest after an underflow.

BUG=internal b/34841900

Review-Url: https://codereview.chromium.org/2677643002
Cr-Commit-Position: refs/heads/master@{#447945}
Committed: https://chromium.googlesource.com/chromium/src/+/f932aa80f326fba263e2f4e23ee886b97b89849a

[jameswest, 2017-02-03 03:55:14]

Description was changed from

==========
[Chromecast] Fix unit test failures due to underflow.

- Return empty RenderingDelay from StreamMixerAlsaInputImpl when
  underflowing.
- Fix expected value in MultizoneBackendTest after an underflow.

BUG=internal b/34841900
==========

to

==========
[Chromecast] Fix unit test failures due to underflow.

- Return empty RenderingDelay from StreamMixerAlsaInputImpl when
  underflowing.
- Fix expected value in MultizoneBackendTest after an underflow.

BUG=internal b/34841900
==========

[jameswest, 2017-02-03 03:55:14]

jameswest@google.com changed reviewers:
+ halliwell@chromium.org, kmackay@chromium.org

[kmackay, 2017-02-03 04:22:09]

lgtm

[halliwell, 2017-02-03 04:31:33]

On 2017/02/03 04:22:09, kmackay wrote:
> lgtm

rs-lgtm

[jameswest, 2017-02-03 04:42:24]

The CQ bit was checked by jameswest@google.com

[commit-bot: I haz the power, 2017-02-03 04:43:00]

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, 2017-02-03 04:56:26]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1486096944803250, "parent_rev":
"2ede32efa1794d35b4e2be92b685b475dbcc5df2", "commit_rev":
"f932aa80f326fba263e2f4e23ee886b97b89849a"}

[commit-bot: I haz the power, 2017-02-03 04:56:58]

Description was changed from

==========
[Chromecast] Fix unit test failures due to underflow.

- Return empty RenderingDelay from StreamMixerAlsaInputImpl when
  underflowing.
- Fix expected value in MultizoneBackendTest after an underflow.

BUG=internal b/34841900
==========

to

==========
[Chromecast] Fix unit test failures due to underflow.

- Return empty RenderingDelay from StreamMixerAlsaInputImpl when
  underflowing.
- Fix expected value in MultizoneBackendTest after an underflow.

BUG=internal b/34841900

Review-Url: https://codereview.chromium.org/2677643002
Cr-Commit-Position: refs/heads/master@{#447945}
Committed:
https://chromium.googlesource.com/chromium/src/+/f932aa80f326fba263e2f4e23ee8...
==========

[commit-bot: I haz the power, 2017-02-03 04:57:06]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/chromium/src/+/f932aa80f326fba263e2f4e23ee8...