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

media/base/audio_buffer_converter.cc

 // Copyright 2014 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/base/audio_buffer_converter.h"
 
 #include <cmath>
 
 #include "base/logging.h"
 #include "media/base/audio_buffer.h"
@@ skipping 124 matching lines @@
 }
 
 void AudioBufferConverter::ResetConverter(
     const scoped_refptr<AudioBuffer>& buffer) {
   Flush();
   audio_converter_.reset();
   input_params_.Reset(
       input_params_.format(),
       buffer->channel_layout(),
       buffer->channel_count(),
-      0,
       buffer->sample_rate(),
       input_params_.bits_per_sample(),
       // If resampling is needed and the FIFO disabled, the AudioConverter will
       // always request SincResampler::kDefaultRequestSize frames.  Otherwise it
       // will use the output frame size.
       buffer->sample_rate() == output_params_.sample_rate()
           ? output_params_.frames_per_buffer()
           : SincResampler::kDefaultRequestSize);
 
   io_sample_rate_ratio_ = static_cast<double>(input_params_.sample_rate()) /
@@ skipping 84 matching lines @@
   is_flushing_ = false;
   audio_converter_->Reset();
   DCHECK_EQ(input_frames_, 0);
   DCHECK_EQ(last_input_buffer_offset_, 0);
   DCHECK_LT(buffered_input_frames_, 1.0);
   DCHECK(queued_inputs_.empty());
   buffered_input_frames_ = 0.0;
 }
 
 }  // namespace media