Adds an internal server and chromium's flag for disabling/enabling FEC

net/quic/quic_packet_creator_test.cc

Index: net/quic/quic_packet_creator_test.cc
diff --git a/net/quic/quic_packet_creator_test.cc b/net/quic/quic_packet_creator_test.cc
index af9b53afecfa17e241a8efa198303a0bebbda944..ff50d5d30af9191b3d4618202a2ae80459f9c7f2 100644
--- a/net/quic/quic_packet_creator_test.cc
+++ b/net/quic/quic_packet_creator_test.cc
@@ -538,7 +538,7 @@ TEST_P(QuicPacketCreatorTest, SwitchFecOnWithStreamFrameQueued) {
   EXPECT_TRUE(creator_.AddSavedFrame(frame));
   EXPECT_TRUE(creator_.HasPendingFrames());
 
-   // Enable FEC protection, and send FEC packet every 6 packets.
+  // Enable FEC protection, and send FEC packet every 6 packets.
   creator_.set_max_packets_per_fec_group(6);
   EXPECT_TRUE(creator_.IsFecEnabled());
   EXPECT_DFATAL(creator_.StartFecProtectingPackets(),
@@ -748,22 +748,23 @@ TEST_P(QuicPacketCreatorTest, UpdatePacketSequenceNumberLengthLeastAwaiting) {
   EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
             creator_.next_sequence_number_length());
 
-  creator_.set_sequence_number(64);
+  creator_.set_max_packets_per_fec_group(1);
+  creator_.set_sequence_number(63);
   creator_.UpdateSequenceNumberLength(2, 10000);
   EXPECT_EQ(PACKET_1BYTE_SEQUENCE_NUMBER,
             creator_.next_sequence_number_length());
 
-  creator_.set_sequence_number(64 * 256);
+  creator_.set_sequence_number(64 * 256 - 1);
   creator_.UpdateSequenceNumberLength(2, 10000);
   EXPECT_EQ(PACKET_2BYTE_SEQUENCE_NUMBER,
             creator_.next_sequence_number_length());
 
-  creator_.set_sequence_number(64 * 256 * 256);
+  creator_.set_sequence_number(64 * 256 * 256 - 1);
   creator_.UpdateSequenceNumberLength(2, 10000);
   EXPECT_EQ(PACKET_4BYTE_SEQUENCE_NUMBER,
             creator_.next_sequence_number_length());
 
-  creator_.set_sequence_number(GG_UINT64_C(64) * 256 * 256 * 256 * 256);
+  creator_.set_sequence_number(GG_UINT64_C(64) * 256 * 256 * 256 * 256 - 1);
   creator_.UpdateSequenceNumberLength(2, 10000);
   EXPECT_EQ(PACKET_6BYTE_SEQUENCE_NUMBER,
             creator_.next_sequence_number_length());