Implement a 15 connection per proxy server limit.

net/socket/socks_client_socket_pool.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_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
 #define NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "base/scoped_ptr.h"
 #include "base/time.h"
+#include "net/base/host_port_pair.h"
 #include "net/base/host_resolver.h"
 #include "net/proxy/proxy_server.h"
 #include "net/socket/client_socket_pool_base.h"
 #include "net/socket/client_socket_pool.h"
 #include "net/socket/tcp_client_socket_pool.h"
 
 namespace net {
 
 class ClientSocketFactory;
 class ConnectJobFactory;
 
 class SOCKSSocketParams {
  public:
   SOCKSSocketParams(const TCPSocketParams& proxy_server, bool socks_v5,
-                    const std::string& destination_host, int destination_port,
+                    const HostPortPair& host_port_pair,
                     RequestPriority priority, const GURL& referrer)
       : tcp_params_(proxy_server),
-        destination_(destination_host, destination_port),
+        destination_(host_port_pair.host, host_port_pair.port),
         socks_v5_(socks_v5) {
     // The referrer is used by the DNS prefetch system to correlate resolutions
     // with the page that triggered them. It doesn't impact the actual addresses
     // that we resolve to.
     destination_.set_referrer(referrer);
     destination_.set_priority(priority);
   }
 
   const TCPSocketParams& tcp_params() const { return tcp_params_; }
   const HostResolver::RequestInfo& destination() const { return destination_; }
@@ skipping 134 matching lines @@
   PoolBase base_;
 
   DISALLOW_COPY_AND_ASSIGN(SOCKSClientSocketPool);
 };
 
 REGISTER_SOCKET_PARAMS_FOR_POOL(SOCKSClientSocketPool, SOCKSSocketParams)
 
 }  // namespace net
 
 #endif  // NET_SOCKET_SOCKS_CLIENT_SOCKET_POOL_H_