Deprecate FLAGS_quic_loss_recovery_use_largest_acked.

net/quic/core/quic_sent_packet_manager_test.cc

Index: net/quic/core/quic_sent_packet_manager_test.cc
diff --git a/net/quic/core/quic_sent_packet_manager_test.cc b/net/quic/core/quic_sent_packet_manager_test.cc
index 2d3d3ca26f36fba92dd199bb490ba700397fd21b..058009375c3f9792d12bbb528b4dada2d18c41fb 100644
--- a/net/quic/core/quic_sent_packet_manager_test.cc
+++ b/net/quic/core/quic_sent_packet_manager_test.cc
@@ -570,46 +570,6 @@ TEST_P(QuicSentPacketManagerTest, AckOriginalTransmission) {
   }
 }
 
-TEST_P(QuicSentPacketManagerTest, AckPreviousTransmissionThenTruncatedAck) {
-  FLAGS_quic_loss_recovery_use_largest_acked = false;
-  if (!GetParam().missing) {
-    return;
-  }
-  SendDataPacket(1);
-  RetransmitAndSendPacket(1, 2);
-  RetransmitAndSendPacket(2, 3);
-  RetransmitAndSendPacket(3, 4);
-  SendDataPacket(5);
-  SendDataPacket(6);
-  SendDataPacket(7);
-  SendDataPacket(8);
-  SendDataPacket(9);
-
-  // Ack previous transmission
-  {
-    QuicAckFrame ack_frame = InitAckFrame(2);
-    NackPackets(1, 2, &ack_frame);
-    ExpectAck(2);
-    manager_.OnIncomingAck(ack_frame, clock_.Now());
-    EXPECT_TRUE(QuicSentPacketManagerPeer::IsUnacked(&manager_, 4));
-  }
-
-  // Truncated ack with 4 NACKs
-  {
-    QuicAckFrame ack_frame = InitAckFrame(6);
-    NackPackets(3, 7, &ack_frame);
-    ack_frame.is_truncated = true;
-    ExpectAckAndLoss(true, 1, 3);
-    manager_.OnIncomingAck(ack_frame, clock_.Now());
-  }
-
-  // High water mark will be raised.
-  QuicPacketNumber unacked[] = {4, 5, 6, 7, 8, 9};
-  VerifyUnackedPackets(unacked, arraysize(unacked));
-  QuicPacketNumber retransmittable[] = {5, 6, 7, 8, 9};
-  VerifyRetransmittablePackets(retransmittable, arraysize(retransmittable));
-}
-
 TEST_P(QuicSentPacketManagerTest, GetLeastUnacked) {
   EXPECT_EQ(1u, manager_.GetLeastUnacked(kDefaultPathId));
 }
@@ -1546,7 +1506,6 @@ TEST_P(QuicSentPacketManagerTest, NegotiateNewRTOFromOptionsAtClient) {
 }
 
 TEST_P(QuicSentPacketManagerTest, NegotiateUndoFromOptionsAtServer) {
-  FLAGS_quic_loss_recovery_use_largest_acked = true;
   EXPECT_FALSE(QuicSentPacketManagerPeer::GetUndoRetransmits(&manager_));
   QuicConfig config;
   QuicTagVector options;
@@ -1598,7 +1557,6 @@ TEST_P(QuicSentPacketManagerTest, NegotiateUndoFromOptionsAtServer) {
 }
 
 TEST_P(QuicSentPacketManagerTest, NegotiateUndoFromOptionsAtClient) {
-  FLAGS_quic_loss_recovery_use_largest_acked = true;
   EXPECT_FALSE(QuicSentPacketManagerPeer::GetUndoRetransmits(&manager_));
   QuicConfig client_config;
   QuicTagVector options;