Add a virtual beamforming audio device on ChromeOS.

media/audio/audio_manager_base.cc

Index: media/audio/audio_manager_base.cc
diff --git a/media/audio/audio_manager_base.cc b/media/audio/audio_manager_base.cc
index ebf1d3617ad6064ae45ad53780b9b90ba1124d8b..b2e4c8c20ecb2c2f2275a4760b206c906e6c65b1 100644
--- a/media/audio/audio_manager_base.cc
+++ b/media/audio/audio_manager_base.cc
@@ -266,13 +266,14 @@ AudioOutputStream* AudioManagerBase::MakeAudioOutputStreamProxy(
       output_params = AudioParameters(
           AudioParameters::AUDIO_FAKE, params.channel_layout(),
           params.sample_rate(), params.bits_per_sample(),
-          params.frames_per_buffer(), params.effects());
+          params.frames_per_buffer(), params.mic_positions(), params.effects());
     } else if (params.effects() != output_params.effects()) {
       // Turn off effects that weren't requested.
       output_params = AudioParameters(
-          output_params.format(), output_params.channel_layout(),
-          output_params.channels(), output_params.sample_rate(),
+          output_params.format(), output_params.channels(),
+          output_params.channel_layout(), output_params.sample_rate(),
           output_params.bits_per_sample(), output_params.frames_per_buffer(),
+          output_params.mic_positions(),
           params.effects() & output_params.effects());
     }
   }