Introduce media::AudioPushFifo and a couple of use cases (and clean-ups).

chrome/renderer/media/cast_receiver_session.cc

 // Copyright 2015 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 "chrome/renderer/media/cast_receiver_session.h"
 
 #include "base/location.h"
 #include "base/synchronization/waitable_event.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/renderer/media/cast_receiver_audio_valve.h"
@@ skipping 151 matching lines @@
     const media::AudioParameters& params,
     CaptureCallback* callback,
     int session_id) {
   // TODO(hubbe): Consider converting the audio to whatever the caller wants.
   if (params.sample_rate() !=
       cast_receiver_session_->audio_config_.rtp_timebase ||
       params.channels() != cast_receiver_session_->audio_config_.channels) {
     callback->OnCaptureError(std::string());
     return;
   }
-  audio_valve_ = new CastReceiverAudioValve(callback);
+  audio_valve_ = new CastReceiverAudioValve(params, callback);
 }
 
 void CastReceiverSession::AudioCapturerSource::Start() {
   DCHECK(audio_valve_);
   cast_receiver_session_->StartAudio(audio_valve_);
 }
 
 void CastReceiverSession::AudioCapturerSource::Stop() {
   audio_valve_->Stop();
   audio_valve_ = nullptr;
 }
 
 void CastReceiverSession::AudioCapturerSource::SetVolume(double volume) {
   // not supported
 }
 
 void CastReceiverSession::AudioCapturerSource::SetAutomaticGainControl(
     bool enable) {
   // not supported
 }