Revert of Revert of Remove the last piece of deprecated synchronous IO code.

media/audio/openbsd/audio_manager_openbsd.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 "media/audio/openbsd/audio_manager_openbsd.h"
 
 #include <fcntl.h>
 
 #include "base/command_line.h"
 #include "base/file_path.h"
@@ skipping 109 matching lines @@
     const std::string& output_device_id,
     const AudioParameters& input_params) {
   // TODO(tommi): Support |output_device_id|.
   DLOG_IF(ERROR, !output_device_id.empty()) << "Not implemented!";
   static const int kDefaultOutputBufferSize = 512;
 
   ChannelLayout channel_layout = CHANNEL_LAYOUT_STEREO;
   int sample_rate = kDefaultSampleRate;
   int buffer_size = kDefaultOutputBufferSize;
   int bits_per_sample = 16;
-  int input_channels = 0;
   if (input_params.IsValid()) {
     sample_rate = input_params.sample_rate();
     bits_per_sample = input_params.bits_per_sample();
     channel_layout = input_params.channel_layout();
-    input_channels = input_params.input_channels();
     buffer_size = std::min(buffer_size, input_params.frames_per_buffer());
   }
 
   int user_buffer_size = GetUserBufferSize();
   if (user_buffer_size)
     buffer_size = user_buffer_size;
 
   return AudioParameters(
-      AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout, input_channels,
+      AudioParameters::AUDIO_PCM_LOW_LATENCY, channel_layout,
       sample_rate, bits_per_sample, buffer_size, AudioParameters::NO_EFFECTS);
 }
 
 AudioOutputStream* AudioManagerOpenBSD::MakeOutputStream(
     const AudioParameters& params) {
   if (pulse_library_is_initialized_)
     return new PulseAudioOutputStream(params, this);
 
   return NULL;
 }
 
 // TODO(xians): Merge AudioManagerOpenBSD with AudioManagerPulse;
 // static
 AudioManager* CreateAudioManager(AudioLogFactory* audio_log_factory) {
   return new AudioManagerOpenBSD(audio_log_factory);
 }
 
 }  // namespace media