Introduce a policy to control the maximal number of connections per proxy server.

net/socket/client_socket_pool_manager.h

 // Copyright (c) 2011 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.
 //
 // ClientSocketPoolManager manages access to all ClientSocketPools.  It's a
 // simple container for all of them.  Most importantly, it handles the lifetime
 // and destruction order properly.
 
 #ifndef NET_SOCKET_CLIENT_SOCKET_POOL_MANAGER_H_
 #define NET_SOCKET_CLIENT_SOCKET_POOL_MANAGER_H_
@@ skipping 33 matching lines @@
 class ProxyInfo;
 class ProxyService;
 class SOCKSClientSocketPool;
 class SSLClientSocketPool;
 class SSLConfigService;
 class SSLHostInfoFactory;
 class TransportClientSocketPool;
 
 struct SSLConfig;
 
+extern const int kDefaultMaxSocketsPerProxyServer;
+
 namespace internal {
 
 // A helper class for auto-deleting Values in the destructor.
 template <typename Key, typename Value>
 class OwnedPoolMap : public std::map<Key, Value> {
  public:
   OwnedPoolMap() {
     COMPILE_ASSERT(base::is_pointer<Value>::value,
                    value_must_be_a_pointer);
   }
@@ skipping 148 matching lines @@
 
   ClientSocketPoolHistograms ssl_socket_pool_for_proxies_histograms_;
   SSLSocketPoolMap ssl_socket_pools_for_proxies_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientSocketPoolManager);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_CLIENT_SOCKET_POOL_MANAGER_H_