Close idle H2 sockets when SpdySession is initialized.

net/socket/client_socket_handle.h

Index: net/socket/client_socket_handle.h
diff --git a/net/socket/client_socket_handle.h b/net/socket/client_socket_handle.h
index 17cfaf80dfa309693a276e74f2268d53263a4405..53e471972c41f80142810efbe4752047c75ef5bc 100644
--- a/net/socket/client_socket_handle.h
+++ b/net/socket/client_socket_handle.h
@@ -117,6 +117,9 @@ class NET_EXPORT ClientSocketHandle {
   // to.  |higher_pool| must have been added by the above function.
   void RemoveHigherLayeredPool(HigherLayeredPool* higher_pool);
 
+  // Closes idle sockets that are in the same group with |this|.
+  void CloseIdleSocketsInGroup();
+
   // Returns true when Init() has completed successfully.
   bool is_initialized() const { return is_initialized_; }