Add a virtual beamforming audio device on ChromeOS.

chromeos/audio/audio_device.cc

 // Copyright (c) 2013 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 "chromeos/audio/audio_device.h"
 
 #include "base/format_macros.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
 #include "base/strings/utf_string_conversions.h"
@@ skipping 130 matching lines @@
                       display_name.c_str());
   base::StringAppendF(&result,
                       "device_name = %s ",
                       device_name.c_str());
   base::StringAppendF(&result,
                       "type = %s ",
                       GetTypeString(type).c_str());
   base::StringAppendF(&result,
                       "active = %s ",
                       active ? "true" : "false");
-  base::StringAppendF(&result,
-                      "plugged_time= %s ",
+  base::StringAppendF(&result, "plugged_time = %s ",
                       base::Uint64ToString(plugged_time).c_str());
+  base::StringAppendF(&result, "mic_positions = %s ", mic_positions.c_str());
 
   return result;
 }
 
 }  // namespace chromeos