Style fixes in rtcp_packet/

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
index 65a65935652e1e8503171e914ef15e57e2982df6..2b5acec0ea578eeb45b46f59b6011f3e94f7921a 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/nack.h
@@ -32,14 +32,13 @@ class Nack : public Rtpfb {
   void SetPacketIds(const uint16_t* nack_list, size_t length);
   const std::vector<uint16_t>& packet_ids() const { return packet_ids_; }
 
- protected:
+  size_t BlockLength() const override;
+
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
               RtcpPacket::PacketReadyCallback* callback) const override;
 
-  size_t BlockLength() const override;
-
  private:
   static constexpr size_t kNackItemLength = 4;
   struct PackedNack {