Close idle H2 sockets when SpdySession is initialized.

net/socket/socks_client_socket_pool.cc

Index: net/socket/socks_client_socket_pool.cc
diff --git a/net/socket/socks_client_socket_pool.cc b/net/socket/socks_client_socket_pool.cc
index 8db91d5467f398e01f36ad7cbe85773923705e70..71704db3144be0ec103eb24bac7661954a891746 100644
--- a/net/socket/socks_client_socket_pool.cc
+++ b/net/socket/socks_client_socket_pool.cc
@@ -255,6 +255,11 @@ void SOCKSClientSocketPool::CloseIdleSockets() {
   base_.CloseIdleSockets();
 }
 
+void SOCKSClientSocketPool::CloseIdleSocketsInGroup(
+    const std::string& group_name) {
+  base_.CloseIdleSocketsInGroup(group_name);
+}
+
 int SOCKSClientSocketPool::IdleSocketCount() const {
   return base_.idle_socket_count();
 }