Strip out stream counting from AudioRendererHost.

content/browser/renderer_host/media/audio_output_delegate_impl.cc

 // Copyright 2016 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/browser/renderer_host/media/audio_output_delegate_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
@@ skipping 162 matching lines @@
   subscriber_->OnStreamCreated(stream_id_, reader_->shared_memory(),
                                reader_->foreign_socket());
 }
 
 void AudioOutputDelegateImpl::UpdatePlayingState(bool playing) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
   if (playing == playing_)
     return;
 
   playing_ = playing;
-  subscriber_->OnStreamStateChanged(playing);
   if (playing) {
     // Note that this takes a reference to |controller_|, and
     // (Start|Stop)MonitoringStream calls are async, so we don't have a
     // guarantee for when the controller is destroyed.
     AudioStreamMonitor::StartMonitoringStream(
         render_process_id_, render_frame_id_, stream_id_,
         base::Bind(&media::AudioOutputController::ReadCurrentPowerAndClip,
                    controller_));
   } else {
     AudioStreamMonitor::StopMonitoringStream(render_process_id_,
                                              render_frame_id_, stream_id_);
   }
 }
 
 void AudioOutputDelegateImpl::OnError() {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
   audio_log_->OnError(stream_id_);
   subscriber_->OnStreamError(stream_id_);
 }
 
 }  // namespace content