Implement RecordingIsInitialized in file_audio_device.cc.

Implement RecordingIsInitialized in file_audio_device.cc.

After https://codereview.webrtc.org/1827263002, audio devices are no
longer (ever) initialized if they return true from
RecordingIsInitialized. Since this was left as "return true;" for
file_audio_device, the recording buffer was never set up correctly, and
the audio buffer would assert when called (in debug) and FileAudioDevice
would cause memory corruption (in release).

BUG=

Committed: https://crrev.com/28fdf5637f6c72cfc1d69dce6940415dead2e88b
Cr-Commit-Position: refs/heads/master@{#13489}

[noahric, 2016-07-01 22:04:48]

noahric@chromium.org changed reviewers:
+ henrika@chromium.org, solenberg@chromium.org

[henrika_webrtc, 2016-07-04 07:24:01]

LGTM

[noahric, 2016-07-07 19:54:31]

The CQ bit was checked by noahric@chromium.org

[commit-bot: I haz the power, 2016-07-07 19:54:42]

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, 2016-07-07 21:55:09]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-07 21:55:10]

Try jobs failed on following builders:
  android_arm64_rel on master.tryserver.webrtc (JOB_TIMED_OUT, no build URL)
  android_dbg on master.tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[noahric, 2016-07-07 22:58:50]

The CQ bit was checked by noahric@chromium.org

[commit-bot: I haz the power, 2016-07-07 22:58:56]

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, 2016-07-08 00:59:22]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-08 00:59:23]

Try jobs failed on following builders:
  android_dbg on master.tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[noahric, 2016-07-14 22:50:20]

The CQ bit was checked by noahric@chromium.org

[commit-bot: I haz the power, 2016-07-14 22:50:30]

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, 2016-07-15 00:51:00]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2016-07-15 00:51:01]

Try jobs failed on following builders:
  android_arm64_rel on master.tryserver.webrtc (JOB_TIMED_OUT, no build URL)

[noahric, 2016-07-15 17:02:15]

The CQ bit was checked by noahric@chromium.org

[commit-bot: I haz the power, 2016-07-15 17:02:22]

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, 2016-07-15 17:03:59]

Committed patchset #1 (id:1)

[commit-bot: I haz the power, 2016-07-15 17:04:11]

Description was changed from

==========
Implement RecordingIsInitialized in file_audio_device.cc.

After https://codereview.webrtc.org/1827263002, audio devices are no
longer (ever) initialized if they return true from
RecordingIsInitialized. Since this was left as "return true;" for
file_audio_device, the recording buffer was never set up correctly, and
the audio buffer would assert when called (in debug) and FileAudioDevice
would cause memory corruption (in release).

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

to

==========
Implement RecordingIsInitialized in file_audio_device.cc.

After https://codereview.webrtc.org/1827263002, audio devices are no
longer (ever) initialized if they return true from
RecordingIsInitialized. Since this was left as "return true;" for
file_audio_device, the recording buffer was never set up correctly, and
the audio buffer would assert when called (in debug) and FileAudioDevice
would cause memory corruption (in release).

BUG=

Committed: https://crrev.com/28fdf5637f6c72cfc1d69dce6940415dead2e88b
Cr-Commit-Position: refs/heads/master@{#13489}
==========

[commit-bot: I haz the power, 2016-07-15 17:04:12]

Patchset 1 (id:??) landed as
https://crrev.com/28fdf5637f6c72cfc1d69dce6940415dead2e88b
Cr-Commit-Position: refs/heads/master@{#13489}