relnote: Deprecate FLAGS_quic_dont_ack_acks.

net/quic/quic_connection_test.cc

Index: net/quic/quic_connection_test.cc
diff --git a/net/quic/quic_connection_test.cc b/net/quic/quic_connection_test.cc
index 683385fdbe643fd4dcef02611695ac1af40ff104..946cea95f82b37bbd0aefd8b4d2a99f3e66c6355 100644
--- a/net/quic/quic_connection_test.cc
+++ b/net/quic/quic_connection_test.cc
@@ -1264,7 +1264,6 @@ TEST_P(QuicConnectionTest, OutOfOrderReceiptCausesAckSend) {
 }
 
 TEST_P(QuicConnectionTest, OutOfOrderAckReceiptCausesNoAck) {
-  ValueRestore<bool> old_flag(&FLAGS_quic_dont_ack_acks, true);
   EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
 
   SendStreamDataToPeer(1, "foo", 0, !kFin, nullptr);
@@ -1283,26 +1282,6 @@ TEST_P(QuicConnectionTest, OutOfOrderAckReceiptCausesNoAck) {
   EXPECT_EQ(2u, writer_->packets_write_attempts());
 }
 
-TEST_P(QuicConnectionTest, OutOfOrderAckReceiptCausesOneAck) {
-  ValueRestore<bool> old_flag(&FLAGS_quic_dont_ack_acks, false);
-  EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
-
-  SendStreamDataToPeer(1, "foo", 0, !kFin, nullptr);
-  SendStreamDataToPeer(1, "bar", 3, !kFin, nullptr);
-  EXPECT_EQ(2u, writer_->packets_write_attempts());
-
-  QuicAckFrame ack1 = InitAckFrame(1);
-  QuicAckFrame ack2 = InitAckFrame(2);
-  EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _));
-  ProcessAckPacket(2, &ack2);
-  // Should ack immediately since we have missing packets.
-  EXPECT_EQ(3u, writer_->packets_write_attempts());
-
-  ProcessAckPacket(1, &ack1);
-  // Should not ack an ack filling a missing packet.
-  EXPECT_EQ(3u, writer_->packets_write_attempts());
-}
-
 TEST_P(QuicConnectionTest, AckReceiptCausesAckSend) {
   EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));