[rtcp] Tmmbn/Tmmbr Parse updated not to use RTCPUtility

webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h
index 801aa085c44c855ea0fab3353899530df6fb3139..de1cf760bbaa64b52e57636713a66879af1412ca 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h
@@ -22,10 +22,10 @@ namespace rtcp {
 // RFC4585, Section 6.2
 class Rtpfb : public RtcpPacket {
  public:
-  static const uint8_t kPacketType = 205;
+  static constexpr uint8_t kPacketType = 205;
 
   Rtpfb() : sender_ssrc_(0), media_ssrc_(0) {}
-  virtual ~Rtpfb() {}
+  ~Rtpfb() override {}
 
   void From(uint32_t ssrc) { sender_ssrc_ = ssrc; }
   void To(uint32_t ssrc) { media_ssrc_ = ssrc; }
@@ -34,7 +34,7 @@ class Rtpfb : public RtcpPacket {
   uint32_t media_ssrc() const { return media_ssrc_; }
 
  protected:
-  static const size_t kCommonFeedbackLength = 8;
+  static constexpr size_t kCommonFeedbackLength = 8;
   void ParseCommonFeedback(const uint8_t* payload);
   void CreateCommonFeedback(uint8_t* payload) const;