Revert of Unify rtcp packet setters

webrtc/modules/rtp_rtcp/source/rtp_rtcp_impl_unittest.cc

 /*
  *  Copyright (c) 2013 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 198 matching lines @@
                      kVideoFrameKey, codec_.plType, 0, 0, payload,
                      sizeof(payload), nullptr, &rtp_video_header, nullptr));
   }
 
   void IncomingRtcpNack(const RtpRtcpModule* module, uint16_t sequence_number) {
     bool sender = module->impl_->SSRC() == kSenderSsrc;
     rtcp::Nack nack;
     uint16_t list[1];
     list[0] = sequence_number;
     const uint16_t kListLength = sizeof(list) / sizeof(list[0]);
-    nack.SetSenderSsrc(sender ? kReceiverSsrc : kSenderSsrc);
-    nack.SetMediaSsrc(sender ? kSenderSsrc : kReceiverSsrc);
-    nack.SetPacketIds(list, kListLength);
+    nack.From(sender ? kReceiverSsrc : kSenderSsrc);
+    nack.To(sender ? kSenderSsrc : kReceiverSsrc);
+    nack.WithList(list, kListLength);
     rtc::Buffer packet = nack.Build();
     EXPECT_EQ(0, module->impl_->IncomingRtcpPacket(packet.data(),
                                                    packet.size()));
   }
 };
 
 TEST_F(RtpRtcpImplTest, SetSelectiveRetransmissions_BaseLayer) {
   sender_.impl_->SetSelectiveRetransmissions(kRetransmitBaseLayer);
   EXPECT_EQ(kRetransmitBaseLayer, sender_.impl_->SelectiveRetransmissions());
 
@@ skipping 317 matching lines @@
   EXPECT_EQ(6U, receiver_.RtcpSent().unique_nack_requests);
   EXPECT_THAT(receiver_.LastNackListSent(), ElementsAre(11, 18, 20, 21));
 
   // Send module receives the request.
   EXPECT_EQ(2U, sender_.RtcpReceived().nack_packets);
   EXPECT_EQ(8U, sender_.RtcpReceived().nack_requests);
   EXPECT_EQ(6U, sender_.RtcpReceived().unique_nack_requests);
   EXPECT_EQ(75, sender_.RtcpReceived().UniqueNackRequestsInPercent());
 }
 }  // namespace webrtc