Detect AudioInputStream muting and propagate to MediaStreamAudioSource.

content/renderer/media/webrtc/processed_local_audio_source.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/webrtc/processed_local_audio_source.h"
 
 #include "base/logging.h"
 #include "base/metrics/histogram_macros.h"
 #include "base/strings/stringprintf.h"
 #include "content/renderer/media/audio_device_factory.h"
@@ skipping 324 matching lines @@
       current_volume = new_volume;
     }
   }
 }
 
 void ProcessedLocalAudioSource::OnCaptureError(const std::string& message) {
   WebRtcLogMessage("ProcessedLocalAudioSource::OnCaptureError: " + message);
   StopSourceOnError(message);
 }
 
+void ProcessedLocalAudioSource::OnCaptureMuted(bool is_muted) {
+  SetMutedState(is_muted);
+}
+
 media::AudioParameters ProcessedLocalAudioSource::GetInputFormat() const {
   return audio_processor_ ? audio_processor_->InputFormat()
                           : media::AudioParameters();
 }
 
 int ProcessedLocalAudioSource::GetBufferSize(int sample_rate) const {
   DCHECK(thread_checker_.CalledOnValidThread());
 #if defined(OS_ANDROID)
   // TODO(henrika): Re-evaluate whether to use same logic as other platforms.
   // http://crbug.com/638081
@@ skipping 12 matching lines @@
 
   // If the buffer size is missing from the StreamDeviceInfo, provide 10ms as a
   // fall-back.
   //
   // TODO(miu): Identify where/why the buffer size might be missing, fix the
   // code, and then require it here. http://crbug.com/638081
   return (sample_rate / 100);
 }
 
 }  // namespace content