Retry 35837 linux: grab device name before closing it

Retry 35837 linux: grab device name before closing it

PcmClose frees the handle regardless of whether there's an error while shutting down, so grab the PcmName result first in case we want to use it in an error message.

Original Review URL: http://codereview.chromium.org/538005

BUG=20006

[Evan Martin, 2010-01-09 00:10:42]

LGTM

[awong, 2010-01-09 00:13:02]

For background, to mock out the ALSA dependency, wrapped the whole ALSA API with
a class "AlsaWrapper".

In the unittest, we insert a gmock verison of the wrapper.

That means, any call to the ALSA API needs to be declared as expected.

In retrospect, this is too much of a characterization test...but it's not clear
that making the mock non-strict (so we ignore extra calls) is a good idea
either.

Anyways, the fix is to add expectations for the PcmName() call you make since it
changed to being called every time the Close() command is called.