PPAPI: Make blocking completion callbacks work.

ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc

Index: ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc
diff --git a/ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc b/ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc
index c4b6bd8cf4c4aeb491f0f804e644449f283f3419..0fd6fa56b76623d60ba6ea767772ea9804853d2c 100644
--- a/ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc
+++ b/ppapi/thunk/ppb_tcp_server_socket_private_thunk.cc
@@ -35,7 +35,8 @@ int32_t Listen(PP_Resource tcp_server_socket,
   EnterTCPServer enter(tcp_server_socket, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Listen(addr, backlog, callback));
+  return enter.SetResult(enter.object()->Listen(addr, backlog,
+                                                enter.callback()));
 }
 
 int32_t Accept(PP_Resource tcp_server_socket,
@@ -44,7 +45,7 @@ int32_t Accept(PP_Resource tcp_server_socket,
   EnterTCPServer enter(tcp_server_socket, callback, true);
   if (enter.failed())
     return enter.retval();
-  return enter.SetResult(enter.object()->Accept(tcp_socket, callback));
+  return enter.SetResult(enter.object()->Accept(tcp_socket, enter.callback()));
 }
 
 void StopListening(PP_Resource tcp_server_socket) {