Revert 46757 - Fix IO thread hang on releasing a socket....

net/socket/client_socket_pool_base.h

Index: net/socket/client_socket_pool_base.h
===================================================================
--- net/socket/client_socket_pool_base.h	(revision 46791)
+++ net/socket/client_socket_pool_base.h	(working copy)
@@ -408,9 +408,6 @@
   // Number of connected sockets we handed out across all groups.
   int handed_out_socket_count_;
 
-  // Number of sockets being released.
-  int num_releasing_sockets_;
-
   // The maximum total number of sockets. See ReachedMaxSocketsLimit.
   const int max_sockets_;