[rtp_rtcp] ReportBlockInformation cleaned and moved out of the rtcp_receiver_help.

webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc

Index: webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc b/webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
index c6df905688bc492335aab0094648d4f6b83a2d65..a4b5eb8ca5dcb5c7ad9e6b9839615195c08aeace 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc
@@ -414,6 +414,7 @@ TEST_F(RtcpReceiverTest, GetRtt) {
 
   rtcp::ReportBlock rb;
   rb.To(kSourceSsrc);
+  rb.WithLastSr(0x43211234);
   rtcp::ReceiverReport rr;
   rr.From(kSenderSsrc);
   rr.WithReportBlock(rb);