Reland 15721002: Hook up the device selection to the WebAudio live audio

media/audio/cras/audio_manager_cras.cc

Index: media/audio/cras/audio_manager_cras.cc
diff --git a/media/audio/cras/audio_manager_cras.cc b/media/audio/cras/audio_manager_cras.cc
index 52fb97e66de9f8778afda7010851a2576c4b1cb5..e1a140eff0ec798bf3dbee5c5bff86320f49aa59 100644
--- a/media/audio/cras/audio_manager_cras.cc
+++ b/media/audio/cras/audio_manager_cras.cc
@@ -74,8 +74,9 @@ AudioOutputStream* AudioManagerCras::MakeLinearOutputStream(
 }
 
 AudioOutputStream* AudioManagerCras::MakeLowLatencyOutputStream(
-    const AudioParameters& params) {
+    const AudioParameters& params, const std::string& input_device_id) {
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
+  // TODO(dgreid): Open the correct input device for unified IO.
   return MakeOutputStream(params);
 }