Deprecate --gfe2_reloadable_flag_quic_tls_no_select_cert_if_disconnected.

PiperOrigin-RevId: 440907212

quiche/quic/core/quic_flags_list.h

diff --git a/quiche/quic/core/quic_flags_list.h b/quiche/quic/core/quic_flags_list.h
index b1c1dec..609734e 100644
--- a/quiche/quic/core/quic_flags_list.h
+++ b/quiche/quic/core/quic_flags_list.h
@@ -57,8 +57,6 @@
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_disable_server_blackhole_detection, false)
 // If true, discard INITIAL packet if the key has been dropped.
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_discard_initial_packet_with_key_dropped, true)
-// If true, do not call ProofSourceHandle::SelectCertificate if QUIC connection has disconnected.
-QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_tls_no_select_cert_if_disconnected, true)
 // If true, do not count bytes sent/received on the alternative path into the bytes sent/received on the default path.
 QUIC_FLAG(FLAGS_quic_reloadable_flag_quic_count_bytes_on_alternative_path_seperately, true)
 // If true, enable server retransmittable on wire PING.

quiche/quic/core/tls_server_handshaker.cc

diff --git a/quiche/quic/core/tls_server_handshaker.cc b/quiche/quic/core/tls_server_handshaker.cc
index 7d14507..6365424 100644
--- a/quiche/quic/core/tls_server_handshaker.cc
+++ b/quiche/quic/core/tls_server_handshaker.cc
@@ -210,10 +210,6 @@
   if (session->connection()->context()->tracer) {
     tls_connection_.EnableInfoCallback();
   }
-
-  if (no_select_cert_if_disconnected_) {
-    QUIC_RELOADABLE_FLAG_COUNT_N(quic_tls_no_select_cert_if_disconnected, 1, 2);
-  }
 }
 
 TlsServerHandshaker::~TlsServerHandshaker() { CancelOutstandingCallbacks(); }
@@ -953,9 +949,7 @@
           ? std::string(alps_result.alps_buffer.get(), alps_result.alps_length)
           : std::string();
 
-  if (no_select_cert_if_disconnected_ &&
-      !session()->connection()->connected()) {
-    QUIC_RELOADABLE_FLAG_COUNT_N(quic_tls_no_select_cert_if_disconnected, 2, 2);
+  if (!session()->connection()->connected()) {
     select_cert_status_ = QUIC_FAILURE;
     return ssl_select_cert_error;
   }

quiche/quic/core/tls_server_handshaker.h

diff --git a/quiche/quic/core/tls_server_handshaker.h b/quiche/quic/core/tls_server_handshaker.h
index b7df310..fc2e9c4 100644
--- a/quiche/quic/core/tls_server_handshaker.h
+++ b/quiche/quic/core/tls_server_handshaker.h
@@ -383,8 +383,6 @@
       last_received_cached_network_params_;
 
   bool cert_matched_sni_ = false;
-  const bool no_select_cert_if_disconnected_ =
-      GetQuicReloadableFlag(quic_tls_no_select_cert_if_disconnected);
 };
 
 }  // namespace quic

quiche/quic/core/tls_server_handshaker_test.cc

diff --git a/quiche/quic/core/tls_server_handshaker_test.cc b/quiche/quic/core/tls_server_handshaker_test.cc
index b49d959..b903821 100644
--- a/quiche/quic/core/tls_server_handshaker_test.cc
+++ b/quiche/quic/core/tls_server_handshaker_test.cc
@@ -1062,13 +1062,6 @@
           }));
 
   AdvanceHandshakeWithFakeClient();
-  if (!GetQuicReloadableFlag(quic_tls_no_select_cert_if_disconnected)) {
-    // SelectCertificate is called when flag is false.
-    EXPECT_FALSE(server_handshaker_->fake_proof_source_handle()
-                     ->all_select_cert_args()
-                     .empty());
-    return;
-  }
 
   EXPECT_TRUE(server_handshaker_->fake_proof_source_handle()
                   ->all_select_cert_args()