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

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

 /*
  *  Copyright (c) 2015 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.
  *
  */
 
 #ifndef WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RTPFB_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RTPFB_H_
 
 #include "webrtc/base/basictypes.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet.h"
 
 namespace webrtc {
 namespace rtcp {
 
 // RTPFB: Transport layer feedback message.
 // 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; }
 
   uint32_t sender_ssrc() const { return sender_ssrc_; }
   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;
 
  private:
   uint32_t sender_ssrc_;
   uint32_t media_ssrc_;
 };
 
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_RTPFB_H_