Reland of Unify rtcp packet setters

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
index 83b3ba954b6f8652ab2cd230d331b024d8672177..e346200a8e1b3093c08a97b390370dfbd8bd6e2d 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
@@ -30,7 +30,7 @@ class Nack : public Rtpfb {
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
-  void WithList(const uint16_t* nack_list, size_t length);
+  void SetPacketIds(const uint16_t* nack_list, size_t length);
   const std::vector<uint16_t>& packet_ids() const { return packet_ids_; }
 
  protected:
@@ -48,7 +48,7 @@ class Nack : public Rtpfb {
     uint16_t bitmask;
   };
 
-  void Pack();    // Fills packed_ using packed_ids_. (used in WithList).
+  void Pack();    // Fills packed_ using packed_ids_. (used in SetPacketIds).
   void Unpack();  // Fills packet_ids_ using packed_. (used in Parse).
 
   std::vector<PackedNack> packed_;