Fix QUIC's TCP style retransmission logic to only send a maximum of 2

net/quic/quic_sent_packet_manager.cc

Index: net/quic/quic_sent_packet_manager.cc
diff --git a/net/quic/quic_sent_packet_manager.cc b/net/quic/quic_sent_packet_manager.cc
index 9be766ca89c15f07dc3b3acc3987900e4cf6df19..bda30c72a1f7fb86c14a32778fa985f41e3fb6b2 100644
--- a/net/quic/quic_sent_packet_manager.cc
+++ b/net/quic/quic_sent_packet_manager.cc
@@ -44,10 +44,8 @@ static const int kMinRetransmissionTimeMs = 200;
 static const int kMaxRetransmissionTimeMs = 60000;
 static const size_t kMaxRetransmissions = 10;
 
-// We want to make sure if we get a nack packet which triggers several
-// retransmissions, we don't queue up too many packets.  10 is TCP's default
-// initial congestion window(RFC 6928).
-static const size_t kMaxRetransmissionsPerAck = kDefaultInitialWindow;
+// We only retransmit 2 packets per ack.
+static const size_t kMaxRetransmissionsPerAck = 2;
 
 // TCP retransmits after 3 nacks.
 static const size_t kNumberOfNacksBeforeRetransmission = 3;