gfe-relnote: Add NET_EXPORT_PRIVATE and override for Chromium merge. Not protected.

PiperOrigin-RevId: 253279256
Change-Id: I7a2306193b3bf87c1399040b7bfcd641a11af16f
diff --git a/quic/core/crypto/tls_connection.h b/quic/core/crypto/tls_connection.h
index 15c2b67..c15d920 100644
--- a/quic/core/crypto/tls_connection.h
+++ b/quic/core/crypto/tls_connection.h
@@ -22,7 +22,7 @@
 // The owner of the TlsConnection is responsible for driving the TLS handshake
 // (and other interactions with the SSL*). This class only handles mapping
 // callbacks to the correct instance.
-class TlsConnection {
+class QUIC_EXPORT_PRIVATE TlsConnection {
  public:
   // A TlsConnection::Delegate implements the methods that are set as callbacks
   // of TlsConnection.