Change the default rtcp mux policy from negotiate to require.

content/renderer/media/rtc_peer_connection_handler.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/media/rtc_peer_connection_handler.h"
 
 #include <string.h>
 
 #include <string>
 #include <utility>
@@ skipping 1380 matching lines @@
   DCHECK(thread_checker_.CalledOnValidThread());
   TRACE_EVENT0("webrtc", "RTCPeerConnectionHandler::setConfiguration");
   GetNativeRtcConfiguration(blink_config, &configuration_);
 
   if (peer_connection_tracker_)
     peer_connection_tracker_->TrackSetConfiguration(this, configuration_);
 
   return native_peer_connection_->SetConfiguration(configuration_);
 }
 
-void RTCPeerConnectionHandler::logSelectedRtcpMuxPolicy(
-    blink::RtcpMuxPolicy selectedRtcpMuxPolicy) {
-  UMA_HISTOGRAM_ENUMERATION("WebRTC.PeerConnection.SelectedRtcpMuxPolicy",
-                            selectedRtcpMuxPolicy, blink::RtcpMuxPolicyMax);
-}
-
 bool RTCPeerConnectionHandler::addICECandidate(
     const blink::WebRTCVoidRequest& request,
     const blink::WebRTCICECandidate& candidate) {
   DCHECK(thread_checker_.CalledOnValidThread());
   TRACE_EVENT0("webrtc", "RTCPeerConnectionHandler::addICECandidate");
   // Libjingle currently does not accept callbacks for addICECandidate.
   // For that reason we are going to call callbacks from here.
 
   // TODO(tommi): Instead of calling addICECandidate here, we can do a
   // PostTaskAndReply kind of a thing.
@@ skipping 540 matching lines @@
 }
 
 void RTCPeerConnectionHandler::ResetUMAStats() {
   DCHECK(thread_checker_.CalledOnValidThread());
   num_local_candidates_ipv6_ = 0;
   num_local_candidates_ipv4_ = 0;
   ice_connection_checking_start_ = base::TimeTicks();
   memset(ice_state_seen_, 0, sizeof(ice_state_seen_));
 }
 }  // namespace content