Add GetMatchingOutputDeviceID to CoreAudioUtil.

Add GetMatchingOutputDeviceID to CoreAudioUtil.
This method accepts an ID of an input device and finds an output device belonging to the same hardware (if one exists) and returns its ID.

BUG=276894
Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=220566

[henrika (OOO until Aug 14), 2013-08-30 09:45:40]

Nice. LGTM.

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
File media/audio/win/core_audio_util_win.cc (right):

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
media/audio/win/core_audio_util_win.cc:397: output_device = NULL;
Is this needed?

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
media/audio/win/core_audio_util_win.cc:401: 
Remove this empty line?

[tommi (sloooow) - chröme, 2013-08-30 10:45:34]

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
File media/audio/win/core_audio_util_win.cc (right):

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
media/audio/win/core_audio_util_win.cc:397: output_device = NULL;
On 2013/08/30 09:45:40, henrika wrote:
> Is this needed?

Yes, otherwise output_device will be assigned to the last element in the
collection when the loop ends and it will belong to the wrong controller.

https://codereview.chromium.org/23618015/diff/1/media/audio/win/core_audio_ut...
media/audio/win/core_audio_util_win.cc:401: 
On 2013/08/30 09:45:40, henrika wrote:
> Remove this empty line?

Done.

[tommi (sloooow) - chröme, 2013-08-30 10:45:40]

address comments

[commit-bot: I haz the power, 2013-08-30 10:46:07]

CQ is trying da patch. Follow status at
https://chromium-status.appspot.com/cq/tommi@chromium.org/23618015/7001

[commit-bot: I haz the power, 2013-08-30 12:40:15]

Change committed as 220566