Close idle H2 sockets when SpdySession is initialized.

net/http/http_proxy_client_socket_pool.h

 // 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.
 
 #ifndef NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_
 #define NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_
 
 #include <memory>
 #include <string>
 
@@ skipping 154 matching lines @@
                      ClientSocketHandle* handle) override;
 
   void ReleaseSocket(const std::string& group_name,
                      std::unique_ptr<StreamSocket> socket,
                      int id) override;
 
   void FlushWithError(int error) override;
 
   void CloseIdleSockets() override;
 
+  void CloseIdleSocketsInGroup(const std::string& group_name) override;
+
   int IdleSocketCount() const override;
 
   int IdleSocketCountInGroup(const std::string& group_name) const override;
 
   LoadState GetLoadState(const std::string& group_name,
                          const ClientSocketHandle* handle) const override;
 
   std::unique_ptr<base::DictionaryValue> GetInfoAsValue(
       const std::string& name,
       const std::string& type,
@@ skipping 40 matching lines @@
   TransportClientSocketPool* const transport_pool_;
   SSLClientSocketPool* const ssl_pool_;
   PoolBase base_;
 
   DISALLOW_COPY_AND_ASSIGN(HttpProxyClientSocketPool);
 };
 
 }  // namespace net
 
 #endif  // NET_HTTP_HTTP_PROXY_CLIENT_SOCKET_POOL_H_