Revert of Unify rtcp packet setters

webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h
index 62c26fef37a9a48ba006d5996a8a0755e737f67c..9e3e41995a1519d8751af7fc958724ca47dcca19 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/voip_metric.h
@@ -35,8 +35,8 @@
   // Consumes VoipMetric::kLength bytes.
   void Create(uint8_t* buffer) const;
 
-  void SetMediaSsrc(uint32_t ssrc) { ssrc_ = ssrc; }
-  void SetVoipMetric(const RTCPVoIPMetric& voip_metric) {
+  void To(uint32_t ssrc) { ssrc_ = ssrc; }
+  void WithVoipMetric(const RTCPVoIPMetric& voip_metric) {
     voip_metric_ = voip_metric;
   }