Tuning WebRTC audio focus type

content/browser/media/session/media_session.cc

Index: content/browser/media/session/media_session.cc
diff --git a/content/browser/media/session/media_session.cc b/content/browser/media/session/media_session.cc
index eedfcd1da8f63e2a3996c708d45a8c843e72e11a..ea25caad4df7d8adeb230f46523aa00d64e6c3d1 100644
--- a/content/browser/media/session/media_session.cc
+++ b/content/browser/media/session/media_session.cc
@@ -81,6 +81,8 @@ void MediaSession::SetMetadata(const base::Optional<MediaMetadata>& metadata) {
 bool MediaSession::AddPlayer(MediaSessionPlayerObserver* observer,
                              int player_id,
                              media::MediaContentType media_content_type) {
+  if (media_content_type == media::MediaContentType::Uncontrollable)
+    return true;
   if (media_content_type == media::MediaContentType::Pepper)
     return AddPepperPlayer(observer, player_id);