Revert of Unify rtcp packet setters

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

 /*
  *  Copyright (c) 2016 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 12 matching lines @@
 // Assumes native bit string stores PictureId (VP8, VP9).
 class Rpsi : public Psfb {
  public:
   static constexpr uint8_t kFeedbackMessageType = 3;
   Rpsi();
   ~Rpsi() override {}
 
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
-  void SetPayloadType(uint8_t payload);
-  void SetPictureId(uint64_t picture_id);
+  void WithPayloadType(uint8_t payload);
+  void WithPictureId(uint64_t picture_id);
 
   uint8_t payload_type() const { return payload_type_; }
   uint64_t picture_id() const { return picture_id_; }
 
  protected:
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
               RtcpPacket::PacketReadyCallback* callback) const override;
 
  private:
   size_t BlockLength() const override { return block_length_; }
   static size_t CalculateBlockLength(uint8_t bitstring_size_bytes);
 
   uint8_t payload_type_;
   uint64_t picture_id_;
   size_t block_length_;
 
   RTC_DISALLOW_COPY_AND_ASSIGN(Rpsi);
 };
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RPSI_H_