Do not attempt to reuse active sockets after a socket pool flush (usually a network change).

net/socket/socks_client_socket_pool.h

Index: net/socket/socks_client_socket_pool.h
diff --git a/net/socket/socks_client_socket_pool.h b/net/socket/socks_client_socket_pool.h
index bd975bae84fe2ef371d009b423426246ccae8680..c202ce1c1066e702894d346473aa055036e55beb 100644
--- a/net/socket/socks_client_socket_pool.h
+++ b/net/socket/socks_client_socket_pool.h
@@ -126,7 +126,10 @@ class SOCKSClientSocketPool : public ClientSocketPool {
                              const ClientSocketHandle* handle);
 
   virtual void ReleaseSocket(const std::string& group_name,
-                             ClientSocket* socket);
+                             ClientSocket* socket,
+                             int id);
+
+  virtual void Flush();
 
   virtual void CloseIdleSockets();