Add code for dummy file audio to fallback to dummy audio.

Add code for dummy file audio to fallback to dummy audio.

BUG=

Committed: https://crrev.com/6a35590d14fd8eb3bdfa085095b2362b84338d14
Cr-Commit-Position: refs/heads/master@{#13804}

[noahric, 2016-08-16 23:53:18]

noahric@chromium.org changed reviewers:
+ henrika@chromium.org, kjellander@webrtc.org

[kjellander_webrtc, 2016-08-17 05:59:39]

lgtm but henrika probably knows this code better.

I see WEBRTC_DUMMY_AUDIO_PLAY_STATIC_FILE doesn't really exist so I guess it was
not properly cleaned up at some point in the past.

[noahric, 2016-08-17 06:05:39]

On 2016/08/17 05:59:39, kjellander_webrtc wrote:
> lgtm but henrika probably knows this code better.
> 
> I see WEBRTC_DUMMY_AUDIO_PLAY_STATIC_FILE doesn't really exist so I guess it
was
> not properly cleaned up at some point in the past.

Thanks! I'll wait for henrika's approval.

Turns out  he actually sorta asked for this change 2 years ago:
https://webrtc-codereview.appspot.com/20609004

webrtc/modules/audio_device/dummy/file_audio_device_factory.cc:28: exit(1);
should we not return NULL here instead?

Heh :)

[henrika_webrtc, 2016-08-17 08:11:13]

How can I say no ;-)

LGTM

[noahric, 2016-08-17 21:58:34]

The CQ bit was checked by noahric@chromium.org

[commit-bot: I haz the power, 2016-08-17 21:58:40]

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

[commit-bot: I haz the power, 2016-08-17 22:19:53]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-08-17 22:20:02]

Description was changed from

==========
Add code for dummy file audio to fallback to dummy audio.

BUG=
==========

to

==========
Add code for dummy file audio to fallback to dummy audio.

BUG=

Committed: https://crrev.com/6a35590d14fd8eb3bdfa085095b2362b84338d14
Cr-Commit-Position: refs/heads/master@{#13804}
==========

[commit-bot: I haz the power, 2016-08-17 22:20:03]

Patchset 1 (id:??) landed as
https://crrev.com/6a35590d14fd8eb3bdfa085095b2362b84338d14
Cr-Commit-Position: refs/heads/master@{#13804}