Close idle H2 sockets when SpdySession is initialized.

net/spdy/spdy_session.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_SPDY_SPDY_SESSION_H_
 #define NET_SPDY_SPDY_SESSION_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 270 matching lines @@
   };
 
   // Returns true if |new_hostname| can be pooled into an existing connection to
   // |old_hostname| associated with |ssl_info|.
   static bool CanPool(TransportSecurityState* transport_security_state,
                       const SSLInfo& ssl_info,
                       const std::string& old_hostname,
                       const std::string& new_hostname);
 
   // Create a new SpdySession.
   // |spdy_session_key| is the host/port that this session connects to, privacy

[Bence, 2017/02/08 00:18:52]

Optional: remove lines 291--294, because they really do not add any value.

[xunjieli, 2017/02/08 14:15:40]

Done.

   // and proxy configuration settings that it's using.
-  // |session| is the HttpNetworkSession.  |net_log| is the NetLog that we log
-  // network events to.
+  // |http_network_session| is the HttpNetworkSession.  |net_log| is the NetLog
+  // that we log network events to.
   SpdySession(const SpdySessionKey& spdy_session_key,
               HttpServerProperties* http_server_properties,
               TransportSecurityState* transport_security_state,
+              HttpNetworkSession* http_network_session,
               bool enable_sending_initial_data,
               bool enable_ping_based_connection_checking,
               size_t session_max_recv_window_size,
               const SettingsMap& initial_settings,
               TimeFunc time_func,
               ServerPushDelegate* push_delegate,
               ProxyDelegate* proxy_delegate,
               NetLog* net_log);
 
   ~SpdySession() override;
@@ skipping 692 matching lines @@
   // Set set of SpdySessionKeys for which this session has serviced
   // requests.
   std::set<SpdySessionKey> pooled_aliases_;
 
   // |pool_| owns us, therefore its lifetime must exceed ours.
   SpdySessionPool* pool_;
   HttpServerProperties* http_server_properties_;
 
   TransportSecurityState* transport_security_state_;
 
+  HttpNetworkSession* http_network_session_;
+
   // The socket handle for this session.
   std::unique_ptr<ClientSocketHandle> connection_;
 
   // The read buffer used to read data from the socket.
   scoped_refptr<IOBuffer> read_buffer_;
 
   SpdyStreamId stream_hi_water_mark_;  // The next stream id to use.
 
   // Used to ensure the server increments push stream ids correctly.
   SpdyStreamId last_accepted_push_stream_id_;
@@ skipping 191 matching lines @@
   // Used for posting asynchronous IO tasks.  We use this even though
   // SpdySession is refcounted because we don't need to keep the SpdySession
   // alive if the last reference is within a RunnableMethod.  Just revoke the
   // method.
   base::WeakPtrFactory<SpdySession> weak_factory_;
 };
 
 }  // namespace net
 
 #endif  // NET_SPDY_SPDY_SESSION_H_