Reland of Unify rtcp packet setters

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

 /*
  *  Copyright (c) 2015 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 18 matching lines @@
   ~Rrtr() {}
 
   Rrtr& operator=(const Rrtr&) = default;
 
   void Parse(const uint8_t* buffer);
 
   // Fills buffer with the Rrtr.
   // Consumes Rrtr::kLength bytes.
   void Create(uint8_t* buffer) const;
 
-  void WithNtp(const NtpTime& ntp) { ntp_ = ntp; }
+  void SetNtp(NtpTime ntp) { ntp_ = ntp; }
 
   NtpTime ntp() const { return ntp_; }
 
  private:
   NtpTime ntp_;
 };
 
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RRTR_H_