Implement a 15 connection per proxy server limit.

net/base/host_port_pair.h

 // Copyright (c) 2010 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.
 
 #ifndef NET_BASE_HOST_PORT_PAIR_H_
 #define NET_BASE_HOST_PORT_PAIR_H_
 
 #include <string>
 #include "base/basictypes.h"
 
 namespace net {
 
 struct HostPortPair {
   HostPortPair();
   // If |in_host| represents an IPv6 address, it should not bracket the address.
   HostPortPair(const std::string& in_host, uint16 in_port);
 
+  // TODO(willchan): Define a functor instead.
   // Comparator function so this can be placed in a std::map.
   bool operator<(const HostPortPair& other) const {
-    if (host != other.host)
-      return host < other.host;
-    return port < other.port;
+    if (port != other.port)
+      return port < other.port;
+    return host < other.host;
   }
 
   // ToString() will convert the HostPortPair to "host:port".  If |host| is an
   // IPv6 literal, it will add brackets around |host|.
   std::string ToString() const;
 
   // If |host| represents an IPv6 address, this string will not contain brackets
   // around the address.
   std::string host;
   uint16 port;
 };
 
 }  // namespace net
 
 #endif  // NET_BASE_HOST_PORT_PAIR_H_