Add a virtual beamforming audio device on ChromeOS.

media/audio/win/audio_low_latency_input_win_unittest.cc

Index: media/audio/win/audio_low_latency_input_win_unittest.cc
diff --git a/media/audio/win/audio_low_latency_input_win_unittest.cc b/media/audio/win/audio_low_latency_input_win_unittest.cc
index 902b03f15f33502fe909a40393997a7ccc332b27..ebc464aac7f972a5637626c3328974390d47727c 100644
--- a/media/audio/win/audio_low_latency_input_win_unittest.cc
+++ b/media/audio/win/audio_low_latency_input_win_unittest.cc
@@ -196,7 +196,7 @@ class AudioInputStreamWrapper {
     AudioInputStream* ais = audio_man_->MakeAudioInputStream(
         AudioParameters(format(), default_params_.channel_layout(),
                         sample_rate(), bits_per_sample(), frames_per_buffer_,
-                        default_params_.effects()),
+                        "", default_params_.effects()),
         AudioManagerBase::kDefaultDeviceId);
     EXPECT_TRUE(ais);
     return ais;