Implement a 15 connection per proxy server limit.

net/proxy/proxy_server.cc

 // Copyright (c) 2009 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/proxy/proxy_server.h"
 
 #include <algorithm>
 
 #include "base/string_tokenizer.h"
 #include "base/string_util.h"
@@ skipping 66 matching lines @@
   return port_;
 }
 
 std::string ProxyServer::host_and_port() const {
   // Doesn't make sense to call this if the URI scheme doesn't
   // have concept of a host.
   DCHECK(is_valid() && !is_direct());
   return host_ + ":" + IntToString(port_);
 }
 
+HostPortPair ProxyServer::host_port_pair() const {
+  // Doesn't make sense to call this if the URI scheme doesn't
+  // have concept of a host.
+  DCHECK(is_valid() && !is_direct());
+  return HostPortPair(host_, port_);
+}
+
 // static
 ProxyServer ProxyServer::FromURI(const std::string& uri,
                                  Scheme default_scheme) {
   return FromURI(uri.begin(), uri.end(), default_scheme);
 }
 
 // static
 ProxyServer ProxyServer::FromURI(std::string::const_iterator begin,
                                  std::string::const_iterator end,
                                  Scheme default_scheme) {
@@ skipping 118 matching lines @@
   }
 
   // Choose a default port number if none was given.
   if (port == -1)
     port = GetDefaultPortForScheme(scheme);
 
   return ProxyServer(scheme, host, port);
 }
 
 }  // namespace net