Add methods to the QuicConnectionDebug visitor for tracking various

net/quic/quic_connection.h

Index: net/quic/quic_connection.h
diff --git a/net/quic/quic_connection.h b/net/quic/quic_connection.h
index e92d6d0406635d6378eeb935582733f2132c3ae0..a98458bb0de5ef1d7cb4c97e3e02fb0733a777a9 100644
--- a/net/quic/quic_connection.h
+++ b/net/quic/quic_connection.h
@@ -137,6 +137,17 @@ class NET_EXPORT_PRIVATE QuicConnectionDebugVisitor
                                 const IPEndPoint& peer_address,
                                 const QuicEncryptedPacket& packet) {}
 
+  // Called when a packet is recived with a connection id that does not
+  // match the ID of this connection.
+  virtual void OnIncorrectConnectionId(
+      QuicConnectionId connection_id) {}
+
+  // Called when an undecryptable packet has been received.
+  virtual void OnUndecryptablePacket() {}
+
+  // Called when a duplicate packet has been received.
+  virtual void OnDuplicatePacket(QuicPacketSequenceNumber sequence_number) {}
+
   // Called when the protocol version on the received packet doensn't match
   // current protocol version of the connection.
   virtual void OnProtocolVersionMismatch(QuicVersion version) {}