Add QUIC_VERSION_15 to add a revived_packets set to replace the

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 5636363093d035190bc6c3d87fedf0e86a0039a5..c1e20f038f6c5420212e24020ee03ade42ace7fc 100644
--- a/net/quic/quic_connection_test.cc
+++ b/net/quic/quic_connection_test.cc
@@ -638,7 +638,7 @@ class QuicConnectionTest : public ::testing::TestWithParam<bool> {
   }
 
   size_t ProcessFecProtectedPacket(QuicPacketSequenceNumber number,
-                                 bool expect_revival, bool entropy_flag) {
+                                   bool expect_revival, bool entropy_flag) {
     if (expect_revival) {
       EXPECT_CALL(visitor_, OnStreamFrames(_)).WillOnce(Return(accept_packet_));
     }
@@ -2785,6 +2785,17 @@ TEST_F(QuicConnectionTest, ReceivedEntropyHashCalculation) {
   EXPECT_EQ(146u, outgoing_ack()->received_info.entropy_hash);
 }
 
+TEST_F(QuicConnectionTest, ReceivedEntropyHashCalculationHalfFEC) {
+  // FEC packets should not change the entropy hash calculation.
+  EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
+  EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));
+  ProcessDataPacket(1, 1, kEntropyFlag);
+  ProcessFecPacket(4, 1, false, kEntropyFlag, NULL);
+  ProcessDataPacket(3, 3, !kEntropyFlag);
+  ProcessFecPacket(7, 3, false, kEntropyFlag, NULL);
+  EXPECT_EQ(146u, outgoing_ack()->received_info.entropy_hash);
+}
+
 TEST_F(QuicConnectionTest, UpdateEntropyForReceivedPackets) {
   EXPECT_CALL(visitor_, OnStreamFrames(_)).WillRepeatedly(Return(true));
   EXPECT_CALL(visitor_, OnSuccessfulVersionNegotiation(_));