Moving flag send_goaway_after_client_migration out of shared code

net/quic/quic_connection.cc

Index: net/quic/quic_connection.cc
diff --git a/net/quic/quic_connection.cc b/net/quic/quic_connection.cc
index 71d9d20379b871f6d0aaf2040457d6e6851e41aa..b1a8a7808da896ef659a4b4d702826aafd64b9d5 100644
--- a/net/quic/quic_connection.cc
+++ b/net/quic/quic_connection.cc
@@ -1367,9 +1367,7 @@ bool QuicConnection::ProcessValidatedPacket() {
              << old_peer_address.ToString() << " to "
              << peer_address_.ToString() << ", migrating connection.";
 
-    if (FLAGS_send_goaway_after_client_migration) {
-      visitor_->OnConnectionMigration();
-    }
+    visitor_->OnConnectionMigration();
   }
 
   time_of_last_received_packet_ = clock_->Now();