Revert of Unify rtcp packet setters

webrtc/modules/rtp_rtcp/source/rtcp_packet/rapid_resync_request_unittest.cc

 /*
  *  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 21 matching lines @@
   RapidResyncRequest mutable_parsed;
   EXPECT_TRUE(test::ParseSinglePacket(kPacket, &mutable_parsed));
   const RapidResyncRequest& parsed = mutable_parsed;
 
   EXPECT_EQ(kSenderSsrc, parsed.sender_ssrc());
   EXPECT_EQ(kRemoteSsrc, parsed.media_ssrc());
 }
 
 TEST(RtcpPacketRapidResyncRequestTest, Create) {
   RapidResyncRequest rrr;
-  rrr.SetSenderSsrc(kSenderSsrc);
-  rrr.SetMediaSsrc(kRemoteSsrc);
+  rrr.From(kSenderSsrc);
+  rrr.To(kRemoteSsrc);
 
   rtc::Buffer packet = rrr.Build();
 
   EXPECT_THAT(make_tuple(packet.data(), packet.size()),
               ElementsAreArray(kPacket));
 }
 
 TEST(RtcpPacketRapidResyncRequestTest, ParseFailsOnTooSmallPacket) {
   const uint8_t kTooSmallPacket[] = {0x85, 205,  0x00, 0x01,
                                      0x12, 0x34, 0x56, 0x78};
   RapidResyncRequest parsed;
   EXPECT_FALSE(test::ParseSinglePacket(kTooSmallPacket, &parsed));
 }
 
 TEST(RtcpPacketRapidResyncRequestTest, ParseFailsOnTooLargePacket) {
   const uint8_t kTooLargePacket[] = {0x85, 205,  0x00, 0x03,
                                      0x12, 0x34, 0x56, 0x78,
                                      0x32, 0x21, 0x65, 0x87,
                                      0x23, 0x45, 0x67, 0x89};
   RapidResyncRequest parsed;
   EXPECT_FALSE(test::ParseSinglePacket(kTooLargePacket, &parsed));
 }
 }  // namespace webrtc