Deprecate FLAGS_quic_reloadable_flag_fix_quic_callback_crash

net/quic/core/quic_crypto_server_stream.cc

Index: net/quic/core/quic_crypto_server_stream.cc
diff --git a/net/quic/core/quic_crypto_server_stream.cc b/net/quic/core/quic_crypto_server_stream.cc
index 49594d6781dce1ea3b60ed6ad0083e12a64caf3c..847c21b9874bebe771ab755c68dfee282e8867fc 100644
--- a/net/quic/core/quic_crypto_server_stream.cc
+++ b/net/quic/core/quic_crypto_server_stream.cc
@@ -143,8 +143,7 @@ void QuicCryptoServerStream::OnHandshakeMessage(
   }
 
   if (validate_client_hello_cb_ != nullptr ||
-      (base::GetFlag(FLAGS_quic_reloadable_flag_fix_quic_callback_crash) &&
-       process_client_hello_cb_ != nullptr)) {
+      process_client_hello_cb_ != nullptr) {
     // Already processing some other handshake message.  The protocol
     // does not allow for clients to send multiple handshake messages
     // before the server has a chance to respond.