Revert of Allow std::unordered_*.

net/base/port_util.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/base/port_util.h"
 
-#include <limits>
 #include <set>
 
 #include "base/lazy_instance.h"
 #include "base/logging.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/string_util.h"
 #include "url/url_constants.h"
 
 namespace net {
 
@@ skipping 160 matching lines @@
 ScopedPortException::~ScopedPortException() {
   std::multiset<int>::iterator it =
       g_explicitly_allowed_ports.Get().find(port_);
   if (it != g_explicitly_allowed_ports.Get().end())
     g_explicitly_allowed_ports.Get().erase(it);
   else
     NOTREACHED();
 }
 
 }  // namespace net