Change QuicAckFrame's revived_packets to be a single QuicPacketNumber. QUIC now ignores all but the…

net/quic/quic_protocol.cc

Index: net/quic/quic_protocol.cc
diff --git a/net/quic/quic_protocol.cc b/net/quic/quic_protocol.cc
index 1e11c6ed30ea3f99e06b13cca4f18da0899c0960..a26c335e8fba2336e148bff39b83f70b3a9545b7 100644
--- a/net/quic/quic_protocol.cc
+++ b/net/quic/quic_protocol.cc
@@ -241,7 +241,8 @@ QuicAckFrame::QuicAckFrame()
     : entropy_hash(0),
       is_truncated(false),
       largest_observed(0),
-      delta_time_largest_observed(QuicTime::Delta::Infinite()) {}
+      delta_time_largest_observed(QuicTime::Delta::Infinite()),
+      latest_revived_packet(0) {}
 
 QuicAckFrame::~QuicAckFrame() {}
 
@@ -474,13 +475,9 @@ ostream& operator<<(ostream& os, const QuicAckFrame& ack_frame) {
      << " delta_time_largest_observed: "
      << ack_frame.delta_time_largest_observed.ToMicroseconds()
      << " missing_packets: [ " << ack_frame.missing_packets
-     << " ] is_truncated: " << ack_frame.is_truncated;
-  os << " revived_packets: [ ";
-  for (PacketNumberSet::const_iterator it = ack_frame.revived_packets.begin();
-       it != ack_frame.revived_packets.end(); ++it) {
-    os << *it << " ";
-  }
-  os << " ] received_packets: [ ";
+     << " ] is_truncated: " << ack_frame.is_truncated
+     << " revived_packet: " << ack_frame.latest_revived_packet
+     << " received_packets: [ ";
   for (const std::pair<QuicPacketNumber, QuicTime>& p :
        ack_frame.received_packet_times) {
     os << p.first << " at " << p.second.ToDebuggingValue() << " ";