Style fixes in rtcp_packet/

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

 /*
  *  Copyright (c) 2016 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_TMMBN_H_
 #define WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBN_H_
 
 #include <vector>
 
 #include "webrtc/base/basictypes.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/rtpfb.h"
 #include "webrtc/modules/rtp_rtcp/source/rtcp_packet/tmmb_item.h"
 
 namespace webrtc {
 namespace rtcp {
 class CommonHeader;
 
 // Temporary Maximum Media Stream Bit Rate Notification (TMMBN).
 // RFC 5104, Section 4.2.2.
 class Tmmbn : public Rtpfb {
  public:
   static constexpr uint8_t kFeedbackMessageType = 4;
 
-  Tmmbn() {}
-  ~Tmmbn() override {}
+  Tmmbn();
+  ~Tmmbn() override;
 
   // Parse assumes header is already parsed and validated.
   bool Parse(const CommonHeader& packet);
 
   void AddTmmbr(const TmmbItem& item);
 
   const std::vector<TmmbItem>& items() const { return items_; }
 
- protected:
+  size_t BlockLength() const override;
+
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
               RtcpPacket::PacketReadyCallback* callback) const override;
 
  private:
-  size_t BlockLength() const override {
-    return kHeaderLength + kCommonFeedbackLength +
-           TmmbItem::kLength * items_.size();
-  }
-
   // Media ssrc is unused, shadow base class setter and getter.
   void SetMediaSsrc(uint32_t ssrc);
   uint32_t media_ssrc() const;
 
   std::vector<TmmbItem> items_;
 };
 }  // namespace rtcp
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_RTP_RTCP_SOURCE_RTCP_PACKET_TMMBN_H_