Deprecate FLAGS_quic_remove_obsolete_forward_secure.

net/quic/core/quic_connection.h

Index: net/quic/core/quic_connection.h
diff --git a/net/quic/core/quic_connection.h b/net/quic/core/quic_connection.h
index 0f87039df8068609dd6168fa32849e2a19980de6..064ab5c4641a4b419c0a64a7d87340256d9879b7 100644
--- a/net/quic/core/quic_connection.h
+++ b/net/quic/core/quic_connection.h
@@ -880,11 +880,6 @@ class NET_EXPORT_PRIVATE QuicConnection
   // Encryption level for new packets. Should only be changed via
   // SetDefaultEncryptionLevel().
   EncryptionLevel encryption_level_;
-  bool has_forward_secure_encrypter_;
-  // The packet number of the first packet which will be encrypted with the
-  // foward-secure encrypter, even if the peer has not started sending
-  // forward-secure packets.
-  QuicPacketNumber first_required_forward_secure_packet_;
   const QuicClock* clock_;
   QuicRandom* random_generator_;