Add a virtual beamforming audio device on ChromeOS.

content/renderer/media/webrtc_local_audio_renderer.cc

Index: content/renderer/media/webrtc_local_audio_renderer.cc
diff --git a/content/renderer/media/webrtc_local_audio_renderer.cc b/content/renderer/media/webrtc_local_audio_renderer.cc
index 6bbdd08889cdf2078e292ae5a195d6f4a23b4d2e..e8d8f401b669940b7e1c57f7c20c8265b9c68042 100644
--- a/content/renderer/media/webrtc_local_audio_renderer.cc
+++ b/content/renderer/media/webrtc_local_audio_renderer.cc
@@ -275,11 +275,12 @@ void WebRtcLocalAudioRenderer::ReconfigureSink(
 
   source_params_ = params;
 
-  sink_params_ = media::AudioParameters(source_params_.format(),
-      source_params_.channel_layout(), source_params_.sample_rate(),
-      source_params_.bits_per_sample(),
+  sink_params_ = media::AudioParameters(
+      source_params_.format(), source_params_.channel_layout(),
+      source_params_.sample_rate(), source_params_.bits_per_sample(),
       WebRtcAudioRenderer::GetOptimalBufferSize(source_params_.sample_rate(),
                                                 frames_per_buffer_),
+      std::vector<media::Point>(),
       // If DUCKING is enabled on the source, it needs to be enabled on the
       // sink as well.
       source_params_.effects() | implicit_ducking_effect);