Deprecate gfe2_reloadable_flag_quic_disconnect_early_exit.

PiperOrigin-RevId: 899680862

quiche/common/quiche_feature_flags_list.h

diff --git a/quiche/common/quiche_feature_flags_list.h b/quiche/common/quiche_feature_flags_list.h
index d0aa747..2149a1c 100755
--- a/quiche/common/quiche_feature_flags_list.h
+++ b/quiche/common/quiche_feature_flags_list.h
@@ -34,7 +34,6 @@
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_disable_version_q046, false, true, "If true, disable QUIC version Q046.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_disable_version_rfcv1, false, false, "If true, disable QUIC version h3 (RFCv1).")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_discard_initial_packet_with_key_dropped, false, true, "If true, discard INITIAL packet if the key has been dropped.")
-QUICHE_FLAG(bool, quiche_reloadable_flag_quic_disconnect_early_exit, true, true, "If true, does not update ack state if the connection has been closed.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_disable_resumption, true, true, "If true, disable resumption when receiving NRES connection option.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_mtu_discovery_at_server, false, false, "If true, QUIC will default enable MTU discovery at server, with a target of 1450 bytes.")
 QUICHE_FLAG(bool, quiche_reloadable_flag_quic_enable_server_on_wire_ping, true, true, "If true, enable server retransmittable on wire PING.")

quiche/quic/core/quic_connection.cc

diff --git a/quiche/quic/core/quic_connection.cc b/quiche/quic/core/quic_connection.cc
index a78eed6..5ad4514 100644
--- a/quiche/quic/core/quic_connection.cc
+++ b/quiche/quic/core/quic_connection.cc
@@ -6107,14 +6107,10 @@
     }
     ResetAckStates();
   }
-  if (GetQuicReloadableFlag(quic_disconnect_early_exit)) {
-    // FlushAckFrame can result in a closed connection. If so, avoid updating
-    // ack state that could trigger QUICHE_BUGs.
-    QUIC_RELOADABLE_FLAG_COUNT(quic_disconnect_early_exit);
-    if (!connected_) {
-      QUIC_CODE_COUNT(quic_flush_ack_frame_result_in_disconnect);
-      return;
-    }
+  // FlushAckFrame can result in a closed connection. If so, avoid updating
+  // ack state that could trigger QUICHE_BUGs.
+  if (!connected_) {
+    return;
   }
 
   const QuicTime timeout =

quiche/quic/core/quic_connection_test.cc

diff --git a/quiche/quic/core/quic_connection_test.cc b/quiche/quic/core/quic_connection_test.cc
index 8555867..e0d8372 100644
--- a/quiche/quic/core/quic_connection_test.cc
+++ b/quiche/quic/core/quic_connection_test.cc
@@ -18354,8 +18354,6 @@
   if (!version().IsIetfQuic()) {
     return;
   }
-  // Test will fail if this flag is false.
-  SetQuicReloadableFlag(quic_disconnect_early_exit, true);
   // Path validation must occur after the handshake is confirmed.
   connection_.RemoveEncrypter(ENCRYPTION_INITIAL);
   connection_.SetDefaultEncryptionLevel(ENCRYPTION_FORWARD_SECURE);