Close idle H2 sockets when SpdySession is initialized.

net/http/http_network_session.cc

Index: net/http/http_network_session.cc
diff --git a/net/http/http_network_session.cc b/net/http/http_network_session.cc
index ffa7b261570d0e1c4d17bfc98a34a45ca50d6890..221cd519bf510985677849149dbff4e202c7e319 100644
--- a/net/http/http_network_session.cc
+++ b/net/http/http_network_session.cc
@@ -225,6 +225,7 @@ HttpNetworkSession::HttpNetworkSession(const Params& params)
                          params.ssl_config_service,
                          params.http_server_properties,
                          params.transport_security_state,
+                         this,
                          params.enable_spdy_ping_based_connection_checking,
                          params.spdy_session_max_recv_window_size,
                          AddDefaultHttp2Settings(params.http2_settings),
@@ -378,6 +379,11 @@ void HttpNetworkSession::CloseIdleConnections() {
   spdy_session_pool_.CloseCurrentIdleSessions();
 }
 
+void HttpNetworkSession::CloseIdleConnectionsInGroup(
+    const std::string& group_name) {
+  normal_socket_pool_manager_->CloseIdleSocketsInGroup(group_name);
+}
+
 bool HttpNetworkSession::IsProtocolEnabled(NextProto protocol) const {
   switch (protocol) {
     case kProtoUnknown: