Update from https://crrev.com/303153

net/tools/quic/quic_time_wait_list_manager.cc

Index: net/tools/quic/quic_time_wait_list_manager.cc
diff --git a/net/tools/quic/quic_time_wait_list_manager.cc b/net/tools/quic/quic_time_wait_list_manager.cc
index eb3228282776462678dc6dcb3b4193f80662e736..58f50fec1d92240f17306c8aaac8591fa4dfeaf7 100644
--- a/net/tools/quic/quic_time_wait_list_manager.cc
+++ b/net/tools/quic/quic_time_wait_list_manager.cc
@@ -28,8 +28,9 @@ namespace tools {
 
 namespace {
 
-// Time period for which the connection_id should live in time wait state..
-const int kTimeWaitSeconds = 5;
+// Time period for which a given connection_id should live in the time-wait
+// state.
+int64 FLAGS_quic_time_wait_list_seconds = 5;
 
 }  // namespace
 
@@ -90,7 +91,8 @@ QuicTimeWaitListManager::QuicTimeWaitListManager(
     EpollServer* epoll_server,
     const QuicVersionVector& supported_versions)
     : epoll_server_(epoll_server),
-      kTimeWaitPeriod_(QuicTime::Delta::FromSeconds(kTimeWaitSeconds)),
+      kTimeWaitPeriod_(
+          QuicTime::Delta::FromSeconds(FLAGS_quic_time_wait_list_seconds)),
       connection_id_clean_up_alarm_(new ConnectionIdCleanUpAlarm(this)),
       clock_(epoll_server_),
       writer_(writer),
@@ -280,6 +282,7 @@ void QuicTimeWaitListManager::CleanUpOldConnectionIds() {
       break;
     }
     // This connection_id has lived its age, retire it now.
+    DVLOG(1) << "Retiring " << it->first << " from the time-wait state.";
     delete it->second.close_packet;
     connection_id_map_.erase(it);
   }