Revert of Unify rtcp packet setters

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h
index 1db99f46ea54e00a64310436b3fe79ecca1dc180..20ccdf2dfe313cd60629537390cb47e834ba750e 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmbr.h
@@ -34,7 +34,7 @@
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
-  void AddTmmbr(const TmmbItem& item);
+  void WithTmmbr(const TmmbItem& item);
 
   const std::vector<TmmbItem>& requests() const { return items_; }
 
@@ -51,7 +51,7 @@
   }
 
   // Media ssrc is unused, shadow base class setter.
-  void SetMediaSsrc(uint32_t ssrc);
+  void To(uint32_t ssrc);
 
   std::vector<TmmbItem> items_;