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

content/common/media/media_param_traits.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/common/media/media_param_traits.h"
 
 #include "base/strings/stringprintf.h"
 #include "media/audio/audio_parameters.h"
 #include "media/base/limits.h"
 #include "media/video/capture/video_capture_types.h"
 
 using media::AudioParameters;
 using media::ChannelLayout;
 using media::VideoCaptureFormat;
 using media::VideoPixelFormat;
 
 namespace IPC {
 
 void ParamTraits<AudioParameters>::Write(Message* m,
                                          const AudioParameters& p) {
   m->WriteInt(static_cast<int>(p.format()));
   m->WriteInt(static_cast<int>(p.channel_layout()));
   m->WriteInt(p.sample_rate());
   m->WriteInt(p.bits_per_sample());
   m->WriteInt(p.frames_per_buffer());
   m->WriteInt(p.channels());
+  m->WriteInt(p.input_channels());
   m->WriteInt(p.effects());
 }
 
 bool ParamTraits<AudioParameters>::Read(const Message* m,
                                         PickleIterator* iter,
                                         AudioParameters* r) {
   int format, channel_layout, sample_rate, bits_per_sample,
-      frames_per_buffer, channels, effects;
+      frames_per_buffer, channels, input_channels, effects;
 
   if (!m->ReadInt(iter, &format) ||
       !m->ReadInt(iter, &channel_layout) ||
       !m->ReadInt(iter, &sample_rate) ||
       !m->ReadInt(iter, &bits_per_sample) ||
       !m->ReadInt(iter, &frames_per_buffer) ||
       !m->ReadInt(iter, &channels) ||
+      !m->ReadInt(iter, &input_channels) ||
       !m->ReadInt(iter, &effects))
     return false;
-
   AudioParameters params(static_cast<AudioParameters::Format>(format),
          static_cast<ChannelLayout>(channel_layout), channels,
-         sample_rate, bits_per_sample, frames_per_buffer, effects);
+         input_channels, sample_rate, bits_per_sample, frames_per_buffer,
+         effects);
   *r = params;
   if (!r->IsValid())
     return false;
   return true;
 }
 
 void ParamTraits<AudioParameters>::Log(const AudioParameters& p,
                                        std::string* l) {
   l->append(base::StringPrintf("<AudioParameters>"));
 }
@@ skipping 23 matching lines @@
     return false;
   return true;
 }
 
 void ParamTraits<VideoCaptureFormat>::Log(const VideoCaptureFormat& p,
                                           std::string* l) {
   l->append(base::StringPrintf("<VideoCaptureFormat>"));
 }
 
 }