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

webrtc/modules/rtp_rtcp/source/rtcp_receiver_unittest.cc

 /*
  *  Copyright (c) 2012 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 396 matching lines @@
   std::set<uint32_t> ssrcs;
   ssrcs.insert(kSourceSsrc);
   rtcp_receiver_->SetSsrcs(kSourceSsrc, ssrcs);
 
   // No report block received.
   EXPECT_EQ(
       -1, rtcp_receiver_->RTT(kSenderSsrc, nullptr, nullptr, nullptr, nullptr));
 
   rtcp::ReportBlock rb;
   rb.To(kSourceSsrc);
+  rb.WithLastSr(0x43211234);
   rtcp::ReceiverReport rr;
   rr.From(kSenderSsrc);
   rr.WithReportBlock(rb);
   rtc::Buffer packet = rr.Build();
   EXPECT_EQ(0, InjectRtcpPacket(packet.data(), packet.size()));
   EXPECT_EQ(kSenderSsrc, rtcp_packet_info_.remoteSSRC);
   EXPECT_EQ(kRtcpRr, rtcp_packet_info_.rtcpPacketTypeFlags);
   EXPECT_EQ(1u, rtcp_packet_info_.report_blocks.size());
   EXPECT_EQ(
       0, rtcp_receiver_->RTT(kSenderSsrc, nullptr, nullptr, nullptr, nullptr));
@@ skipping 724 matching lines @@
 
   // Transport feedback should be ignored, but next packet should work.
   EXPECT_EQ(0u, rtcp_packet_info_.rtcpPacketTypeFlags & kRtcpTransportFeedback);
   EXPECT_NE(0u, rtcp_packet_info_.rtcpPacketTypeFlags & kRtcpRemb);
   EXPECT_EQ(kBitrateBps, rtcp_packet_info_.receiverEstimatedMaxBitrate);
 }
 
 }  // Anonymous namespace
 
 }  // namespace webrtc