Include default communication devices in audio device enumerations. This removes heuristic that pic…

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
diff --git a/media/audio/audio_manager_base.h b/media/audio/audio_manager_base.h
index 866ecef5ce68737cebfd28460849aab1c9d357e0..346fe47f79bb6ab2b6931f3ba38edd452e12cb16 100644
--- a/media/audio/audio_manager_base.h
+++ b/media/audio/audio_manager_base.h
@@ -35,6 +35,10 @@ class MEDIA_EXPORT AudioManagerBase : public AudioManager {
   static const char kDefaultDeviceName[];
   // Unique Id of the generic "default" device.
   static const char kDefaultDeviceId[];
+  // Unique Id of the generic default communications device (where supported).
+  static const char kCommunicationsDeviceId[];
+  // Name of the generic default communications device (where supported).
+  static const char kCommunicationsDeviceName[];
 
   // Input device ID used to capture the default system playback stream. When
   // this device ID is passed to MakeAudioInputStream() the returned