Switching AudioInputDeviceManager from using AudioManager interface to AudioSystem one.

media/audio/audio_manager.cc

Index: media/audio/audio_manager.cc
diff --git a/media/audio/audio_manager.cc b/media/audio/audio_manager.cc
index 4b98e36910f500ecd31402fcf2a7ffec1a277a74..e0c9fbd967cdf572e48501947fbc7b23dda23f35 100644
--- a/media/audio/audio_manager.cc
+++ b/media/audio/audio_manager.cc
@@ -254,21 +254,20 @@ void AudioManagerDeleter::operator()(const AudioManager* instance) const {
     LOG(WARNING) << "Multiple instances of AudioManager detected";
   }
 
-#if defined(OS_MACOSX)
   // If we are on Mac, tasks after this point are not executed, hence this is
   // the only chance to delete the audio manager (which on Mac lives on the
   // main browser thread instead of a dedicated audio thread). If we don't
   // delete here, the CoreAudio thread can keep providing callbacks, which
   // uses a state that is destroyed in ~BrowserMainLoop().
   // See http://crbug.com/623703 for more details.
-  DCHECK(instance->GetTaskRunner()->BelongsToCurrentThread());
-  delete instance;
-#else
+  if (instance->GetTaskRunner()->BelongsToCurrentThread()) {
+    delete instance;
+    return;
+  }
+
   // AudioManager must be destroyed on the audio thread.
-  if (!instance->GetTaskRunner()->DeleteSoon(FROM_HERE, instance)) {
+  if (!instance->GetTaskRunner()->DeleteSoon(FROM_HERE, instance))
     LOG(WARNING) << "Failed to delete AudioManager instance.";
-  }
-#endif
 }
 
 // Forward declaration of the platform specific AudioManager factory function.