Detect AudioInputStream muting and propagate to MediaStreamAudioSource.

content/renderer/media/media_stream_audio_source.cc

Index: content/renderer/media/media_stream_audio_source.cc
diff --git a/content/renderer/media/media_stream_audio_source.cc b/content/renderer/media/media_stream_audio_source.cc
index be556185ada9f1330dc8cd2194445dca4822803e..649ea15f919f523f2cefe905dbe0650a7f07bac1 100644
--- a/content/renderer/media/media_stream_audio_source.cc
+++ b/content/renderer/media/media_stream_audio_source.cc
@@ -147,4 +147,11 @@ void MediaStreamAudioSource::StopSourceOnError(const std::string& why) {
       FROM_HERE, base::Bind(&MediaStreamSource::StopSource, GetWeakPtr()));
 }
 
+void MediaStreamAudioSource::SetMutedState(bool muted_state) {
+  DVLOG(3) << "MediaStreamAudioSource::SetMutedState state=" << muted_state;
+  task_runner_->PostTask(
+      FROM_HERE, base::Bind(&MediaStreamSource::SetSourceMuted, GetWeakPtr(),

[ossu-chromium, 2017/06/01 15:56:59]

I've put SetSourceMuted directly in MediaStreamSource for now. It's got similar
functionality to what's already in MediaStreamVideoSource, so maybe I should get
both implementations to call SetSourceMuted. Or I should just put this
functionality here in MediaStreamAudioSource instead?

[Max Morin, 2017/06/02 09:56:04]

I think someone with experience in this layer should look at this code. Judging
from the git log, maybe miu@?

[ossu-chromium, 2017/06/02 10:47:59]

Sounds good. I'll add him!

+                            muted_state));
+}
+
 }  // namespace content