There is a racing between SyncSocket::Receive in audio_thread_ and SyncSocket::Close in renderer ...

content/renderer/media/webrtc_audio_device_impl.cc

Index: content/renderer/media/webrtc_audio_device_impl.cc
diff --git a/content/renderer/media/webrtc_audio_device_impl.cc b/content/renderer/media/webrtc_audio_device_impl.cc
index 2d5bd365a245b2fe2a311ea908dee7c24f34c106..1039fd25f63a883443bead6b3aa4100138c398cd 100644
--- a/content/renderer/media/webrtc_audio_device_impl.cc
+++ b/content/renderer/media/webrtc_audio_device_impl.cc
@@ -597,8 +597,9 @@ int32_t WebRtcAudioDeviceImpl::StopPlayout() {
     // webrtc::VoiceEngine assumes that it is OK to call Stop() just in case.
     return 0;
   }
-  playing_ = !audio_output_device_->Stop();
-  return (!playing_ ? 0 : -1);
+  audio_output_device_->Stop();
+  playing_ = false;
+  return 0;
 }
 
 bool WebRtcAudioDeviceImpl::Playing() const {
@@ -646,8 +647,9 @@ int32_t WebRtcAudioDeviceImpl::StopRecording() {
     // webrtc::VoiceEngine assumes that it is OK to call Stop() just in case.
     return 0;
   }
-  recording_ = !audio_input_device_->Stop();
-  return (!recording_ ? 0 : -1);
+  audio_input_device_->Stop();
+  recording_ = false;
+  return 0;
 }
 
 bool WebRtcAudioDeviceImpl::Recording() const {