Update from https://crrev.com/303153

net/tools/quic/quic_time_wait_list_manager.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "net/tools/quic/quic_time_wait_list_manager.h"
 
 #include <errno.h>
 
 #include "base/containers/hash_tables.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 10 matching lines @@
 #include "net/tools/quic/quic_server_session.h"
 
 using base::StringPiece;
 using std::make_pair;
 
 namespace net {
 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
 
 // A very simple alarm that just informs the QuicTimeWaitListManager to clean
 // up old connection_ids. This alarm should be unregistered and deleted before
 // the QuicTimeWaitListManager is deleted.
 class ConnectionIdCleanUpAlarm : public EpollAlarm {
  public:
   explicit ConnectionIdCleanUpAlarm(
       QuicTimeWaitListManager* time_wait_list_manager)
@@ skipping 40 matching lines @@
 
   DISALLOW_COPY_AND_ASSIGN(QueuedPacket);
 };
 
 QuicTimeWaitListManager::QuicTimeWaitListManager(
     QuicPacketWriter* writer,
     QuicServerSessionVisitor* visitor,
     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),
       visitor_(visitor) {
   SetConnectionIdCleanUpAlarm();
 }
 
 QuicTimeWaitListManager::~QuicTimeWaitListManager() {
   connection_id_clean_up_alarm_->UnregisterIfRegistered();
   STLDeleteElements(&pending_packets_queue_);
@@ skipping 169 matching lines @@
 
 void QuicTimeWaitListManager::CleanUpOldConnectionIds() {
   QuicTime now = clock_.ApproximateNow();
   while (!connection_id_map_.empty()) {
     ConnectionIdMap::iterator it = connection_id_map_.begin();
     QuicTime oldest_connection_id = it->second.time_added;
     if (now.Subtract(oldest_connection_id) < kTimeWaitPeriod_) {
       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);
   }
   SetConnectionIdCleanUpAlarm();
 }
 
 }  // namespace tools
 }  // namespace net