Add a virtual beamforming audio device on ChromeOS.

content/browser/renderer_host/media/audio_input_device_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/renderer_host/media/audio_input_device_manager.h"
 
 #include "base/bind.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram_macros.h"
 #include "content/public/browser/browser_thread.h"
@@ skipping 195 matching lines @@
     input_params.channel_layout = media::CHANNEL_LAYOUT_STEREO;
   } else {
     // Get the preferred sample rate and channel configuration for the
     // audio device.
     media::AudioParameters params =
         audio_manager_->GetInputStreamParameters(info.device.id);
     input_params.sample_rate = params.sample_rate();
     input_params.channel_layout = params.channel_layout();
     input_params.frames_per_buffer = params.frames_per_buffer();
     input_params.effects = params.effects();
+    input_params.mic_positions = params.mic_positions();
 
     // Add preferred output device information if a matching output device
     // exists.
     out.device.matched_output_device_id =
         audio_manager_->GetAssociatedOutputDeviceID(info.device.id);
     if (!out.device.matched_output_device_id.empty()) {
       params = audio_manager_->GetOutputStreamParameters(
           out.device.matched_output_device_id);
       MediaStreamDevice::AudioDeviceParameters& matched_output_params =
           out.device.matched_output;
@@ skipping 71 matching lines @@
 #if defined(OS_CHROMEOS)
 void AudioInputDeviceManager::SetKeyboardMicStreamActiveOnUIThread(
     bool active) {
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
   chromeos::CrasAudioHandler::Get()->SetKeyboardMicActive(active);
 }
 #endif
 
 
 }  // namespace content