Pretend the video has no audio track if it is playing as part of autoplay muted.

media/blink/webmediaplayer_impl.cc

Index: media/blink/webmediaplayer_impl.cc
diff --git a/media/blink/webmediaplayer_impl.cc b/media/blink/webmediaplayer_impl.cc
index 7c67743e982b430e3c7794a1e1d2a3310806ee3c..9c6c7010da9136c9fc8268079c424fe2d00584f1 100644
--- a/media/blink/webmediaplayer_impl.cc
+++ b/media/blink/webmediaplayer_impl.cc
@@ -536,6 +536,8 @@ void WebMediaPlayerImpl::setVolume(double volume) {
   pipeline_.SetVolume(volume_ * volume_multiplier_);
   if (watch_time_reporter_)
     watch_time_reporter_->OnVolumeChange(volume);
+
+  UpdatePlayState();
 }
 
 void WebMediaPlayerImpl::setSinkId(
@@ -1584,8 +1586,13 @@ void WebMediaPlayerImpl::UpdatePlayState() {
 }
 
 void WebMediaPlayerImpl::SetDelegateState(DelegateState new_state) {
-  if (!delegate_ || delegate_state_ == new_state)
+  if (!delegate_)
+    return;
+
+  if (delegate_state_ != DelegateState::PLAYING &&
+      delegate_state_ == new_state) {
     return;
+  }
 
   delegate_state_ = new_state;
 
@@ -1593,11 +1600,13 @@ void WebMediaPlayerImpl::SetDelegateState(DelegateState new_state) {
     case DelegateState::GONE:
       delegate_->PlayerGone(delegate_id_);
       break;
-    case DelegateState::PLAYING:
+    case DelegateState::PLAYING: {
+      bool has_audio = client_->isAutoplayingMuted() ? false : hasAudio();
       delegate_->DidPlay(
-          delegate_id_, hasVideo(), hasAudio(), false,
+          delegate_id_, hasVideo(), has_audio, false,
           media::DurationToMediaContentType(pipeline_.GetMediaDuration()));
       break;
+    }
     case DelegateState::PAUSED:
       delegate_->DidPause(delegate_id_, false);
       break;