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

media/audio/mac/audio_auhal_mac_unittest.cc

Index: media/audio/mac/audio_auhal_mac_unittest.cc
diff --git a/media/audio/mac/audio_auhal_mac_unittest.cc b/media/audio/mac/audio_auhal_mac_unittest.cc
index cab8c28cd6e2bbb0fd4f3dd27602c63828c5f0ff..b4cf8c64cc65d2e8549ce156cc7ba00920028c26 100644
--- a/media/audio/mac/audio_auhal_mac_unittest.cc
+++ b/media/audio/mac/audio_auhal_mac_unittest.cc
@@ -100,7 +100,8 @@ class AudioOutputStreamWrapper {
                  sample_rate_, bits_per_sample_,
                  samples_per_packet_);
 
-    AudioOutputStream* aos = audio_man_->MakeAudioOutputStream(params);
+    AudioOutputStream* aos = audio_man_->MakeAudioOutputStream(params,
+                                                               std::string());
     EXPECT_TRUE(aos);
     return aos;
   }