rtcp::ReceiverReport moved into own file and got Parse function

webrtc/modules/rtp_rtcp/source/rtcp_packet.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet.h
index d27a9878eeadf48324902d87bc18d0c3b30f5661..c26cd40e9b91438600d8ede04f4f04aef9e6f789 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet.h
@@ -217,52 +217,6 @@ class SenderReport : public RtcpPacket {
   RTC_DISALLOW_COPY_AND_ASSIGN(SenderReport);
 };
 
-//
-// RTCP receiver report (RFC 3550).
-//
-//   0                   1                   2                   3
-//   0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
-//  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-//  |V=2|P|    RC   |   PT=RR=201   |             length            |
-//  +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
-//  |                     SSRC of packet sender                     |
-//  +=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+=+
-//  |                         report block(s)                       |
-//  |                            ....                               |
-
-class ReceiverReport : public RtcpPacket {
- public:
-  ReceiverReport() : RtcpPacket() {
-    memset(&rr_, 0, sizeof(rr_));
-  }
-
-  virtual ~ReceiverReport() {}
-
-  void From(uint32_t ssrc) {
-    rr_.SenderSSRC = ssrc;
-  }
-  bool WithReportBlock(const ReportBlock& block);
-
- protected:
-  bool Create(uint8_t* packet,
-              size_t* index,
-              size_t max_length,
-              RtcpPacket::PacketReadyCallback* callback) const override;
-
- private:
-  static const int kMaxNumberOfReportBlocks = 0x1F;
-
-  size_t BlockLength() const {
-    const size_t kRrHeaderLength = 8;
-    return kRrHeaderLength + report_blocks_.size() * kReportBlockLength;
-  }
-
-  RTCPUtility::RTCPPacketRR rr_;
-  std::vector<ReportBlock> report_blocks_;
-
-  RTC_DISALLOW_COPY_AND_ASSIGN(ReceiverReport);
-};
-
 // Source Description (SDES) (RFC 3550).
 //
 //         0                   1                   2                   3