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

content/renderer/media/audio_message_filter.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/renderer/media/audio_message_filter.h"
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop_proxy.h"
 #include "base/strings/stringprintf.h"
 #include "content/common/media/audio_messages.h"
@@ skipping 216 matching lines @@
   // TODO(crogers): fix OnOutputDeviceChanged() to pass AudioParameters.
   media::ChannelLayout channel_layout =
       audio_hardware_config_->GetOutputChannelLayout();
   int channels = audio_hardware_config_->GetOutputChannels();
 
   media::AudioParameters output_params;
   output_params.Reset(
       media::AudioParameters::AUDIO_PCM_LOW_LATENCY,
       channel_layout,
       channels,
-      0,
       new_sample_rate,
       16,
       new_buffer_size);
 
   audio_hardware_config_->UpdateOutputConfig(output_params);
 }
 
 void AudioMessageFilter::SetAudioHardwareConfig(
     media::AudioHardwareConfig* config) {
   base::AutoLock auto_lock(lock_);
   audio_hardware_config_ = config;
 }
 
 }  // namespace content