Update from https://crrev.com/307330

net/quic/quic_time_wait_list_manager.cc

Index: net/quic/quic_time_wait_list_manager.cc
diff --git a/net/quic/quic_time_wait_list_manager.cc b/net/quic/quic_time_wait_list_manager.cc
index 67d347f1ec86e752c983fad5157bb3bf483ed894..8f1f564117ec07180de4ed6532330d6395abf006 100644
--- a/net/quic/quic_time_wait_list_manager.cc
+++ b/net/quic/quic_time_wait_list_manager.cc
@@ -27,8 +27,9 @@ namespace net {
 
 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
 
@@ -88,7 +89,8 @@ QuicTimeWaitListManager::QuicTimeWaitListManager(
     QuicConnectionHelperInterface* helper,
     const QuicVersionVector& supported_versions)
     : helper_(helper),
-      kTimeWaitPeriod_(QuicTime::Delta::FromSeconds(kTimeWaitSeconds)),
+      kTimeWaitPeriod_(
+          QuicTime::Delta::FromSeconds(FLAGS_quic_time_wait_list_seconds)),
       connection_id_clean_up_alarm_(
           helper_->CreateAlarm(new ConnectionIdCleanUpAlarm(this))),
       writer_(writer),
@@ -276,6 +278,7 @@ 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);
   }