Remove lastest_revived_packet from QuicAckFrame since FEC is gone. No functional change expected.

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 c5f536735ae218ba20b041c3d88f9831b7f81a92..b7acaeb979bb75e9dfe03acdcc1d2ce678c1fab6 100644
--- a/net/quic/quic_connection_test.cc
+++ b/net/quic/quic_connection_test.cc
@@ -4444,27 +4444,6 @@ TEST_P(QuicConnectionTest, AckNotifierCallbackForAckOfNackedPacket) {
   ProcessAckPacket(&third_ack_frame);
 }
 
-TEST_P(QuicConnectionTest, AckNotifierFECTriggerCallback) {
-  EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
-
-  // Create a listener which we expect to be called.
-  scoped_refptr<MockAckListener> listener(new MockAckListener);
-  EXPECT_CALL(*listener, OnPacketAcked(_, _)).Times(1);
-  // Send some data, which will register the listener to be notified.
-  connection_.SendStreamDataWithString(1, "foo", 0, !kFin, listener.get());
-  connection_.SendStreamDataWithString(2, "bar", 0, !kFin, nullptr);
-
-  // Process an ACK from the server with a revived packet, which should trigger
-  // the callback.
-  EXPECT_CALL(*send_algorithm_, OnCongestionEvent(true, _, _, _));
-  QuicAckFrame frame = InitAckFrame(2);
-  NackPacket(1, &frame);
-  frame.latest_revived_packet = 1;
-  ProcessAckPacket(&frame);
-  // If the ack is processed again, the notifier should not be called again.
-  ProcessAckPacket(&frame);
-}
-
 TEST_P(QuicConnectionTest, OnPacketHeaderDebugVisitor) {
   QuicPacketHeader header;