deprecate quic_use_rfc7539

net/quic/crypto/quic_crypto_server_config.cc

Index: net/quic/crypto/quic_crypto_server_config.cc
diff --git a/net/quic/crypto/quic_crypto_server_config.cc b/net/quic/crypto/quic_crypto_server_config.cc
index ca27cad8570e42082068c9ef415aa401f7bb91ee..00f20cbfa1c60b25c76fe5d40fea94fa20d7674a 100644
--- a/net/quic/crypto/quic_crypto_server_config.cc
+++ b/net/quic/crypto/quic_crypto_server_config.cc
@@ -292,8 +292,7 @@ QuicServerConfigProtobuf* QuicCryptoServerConfig::GenerateConfig(
     msg.SetTaglist(kKEXS, kC255, 0);
   }
   if (FLAGS_quic_crypto_server_config_default_has_chacha20) {
-    if (FLAGS_quic_use_rfc7539 &&
-        ChaCha20Poly1305Rfc7539Encrypter::IsSupported()) {
+    if (ChaCha20Poly1305Rfc7539Encrypter::IsSupported()) {
       msg.SetTaglist(kAEAD, kAESG, kCC12, kCC20, 0);
     } else {
       msg.SetTaglist(kAEAD, kAESG, kCC12, 0);