Save/Restore ALSA volume/mute fix

After getting volume and mute to restore (Issue 6118006), there was one case where it did not: if volume
was adjusted for the first time after a fresh install, it would not be remembered on next boot until
mute was pressed at least once.

BUG=chrome-os:10470
TEST=Manual, volume should be the same after adjusting after fresh install and rebooting

Review URL: http://codereview.chromium.org/6321014

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@72179 0039d316-1c4b-4281-b951-d872f2087c98

chrome/browser/chromeos/audio_mixer_alsa.cc

@@ -300,7 +300,7 @@ void AudioMixerAlsa::DoSetVolumeMute(double pref_volume, int pref_mute) {
   if (mute) {
     save_volume_ = pref_volume;
     DoSetVolumeDb_Locked(min_volume_);
-  } else if (pref_mute == kPrefMuteOff) {
+  } else {
       DoSetVolumeDb_Locked(pref_volume);
   }