Reland of Unify rtcp packet setters

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h
index a801816650c8f8bb0d9d42a941b14bbf46d338a6..23db484edf8d6d406df74158ac33c1d30cd1b086 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbn.h
@@ -34,10 +34,7 @@ class Tmmbn : public Rtpfb {
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
-  void WithTmmbr(uint32_t ssrc, uint32_t bitrate_kbps, uint16_t overhead) {
-    WithTmmbr(TmmbItem(ssrc, bitrate_kbps * 1000, overhead));
-  }
-  void WithTmmbr(const TmmbItem& item);
+  void AddTmmbr(const TmmbItem& item);
 
   const std::vector<TmmbItem>& items() const { return items_; }
 
@@ -54,7 +51,7 @@ class Tmmbn : public Rtpfb {
   }
 
   // Media ssrc is unused, shadow base class setter and getter.
-  void To(uint32_t ssrc);
+  void SetMediaSsrc(uint32_t ssrc);
   uint32_t media_ssrc() const;
 
   std::vector<TmmbItem> items_;