Use _numMixedParticipants instead of audioFrameList->size() to determine if there're more than one participants.

There are two audioFrameLists. The previous check wouldn't work correctly if each list had a single member.

TEST=chrome https://apprtc.appspot.com/?debug=loopback&video=false and verify e2e delay stats
BUG=
R=andrew@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/15019004

git-svn-id: http://webrtc.googlecode.com/svn/trunk/webrtc@6723 4adac7df-926f-26a2-2b94-8c16560cd09d
1 file changed