Style fixes in rtcp_packet/

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

Index: webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
diff --git a/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h b/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
index 09723ef949137ff2a175e70c6713e665c50dd6cb..cb34f370c5d93d99f278919836396c77dcb803f1 100644
--- a/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
+++ b/webrtc/modules/rtp_rtcp/source/rtcp_packet/extended_reports.h
@@ -52,7 +52,8 @@ class ExtendedReports : public RtcpPacket {
     return target_bitrate_;
   }
 
- protected:
+  size_t BlockLength() const override;
+
   bool Create(uint8_t* packet,
               size_t* index,
               size_t max_length,
@@ -61,11 +62,6 @@ class ExtendedReports : public RtcpPacket {
  private:
   static constexpr size_t kXrBaseLength = 4;
 
-  size_t BlockLength() const override {
-    return kHeaderLength + kXrBaseLength + RrtrLength() + DlrrLength() +
-           VoipMetricLength() + TargetBitrateLength();
-  }
-
   size_t RrtrLength() const { return rrtr_block_ ? Rrtr::kLength : 0; }
   size_t DlrrLength() const { return dlrr_block_.BlockLength(); }
   size_t VoipMetricLength() const {