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

media/audio/linux/audio_manager_linux.cc

Index: media/audio/linux/audio_manager_linux.cc
diff --git a/media/audio/linux/audio_manager_linux.cc b/media/audio/linux/audio_manager_linux.cc
index c898f813ad460b354c88eb1d2553b0c732b8a3e1..3115523935c356d3da57a1aa7ec43cba42d99c7d 100644
--- a/media/audio/linux/audio_manager_linux.cc
+++ b/media/audio/linux/audio_manager_linux.cc
@@ -256,8 +256,10 @@ AudioOutputStream* AudioManagerLinux::MakeLinearOutputStream(
 }
 
 AudioOutputStream* AudioManagerLinux::MakeLowLatencyOutputStream(
-    const AudioParameters& params) {
+    const AudioParameters& params,
+    const std::string& input_device_id) {
   DCHECK_EQ(AudioParameters::AUDIO_PCM_LOW_LATENCY, params.format());
+  // TODO(xians): Use input_device_id for unified IO.
   return MakeOutputStream(params);
 }