move libevent into base

third_party/libevent/nacl_nonsfi/signal_stub.c

-/*
- * Copyright 2015 The Chromium Authors. All rights reserved.
- * Use of this source code is governed by a BSD-style license that can be
- * found in the LICENSE file.
- */
-
-/*
- * In nacl_helper_nonsfi, socketpair() is unavailable. In libevent, it is used
- * to notify of a signal handler invocation, which is unused in
- * nacl_helper_nonsfi. Unfortunately, there is no macro to disable the feature,
- * so we stub out the signal module entirely.
- */
-
-
-#include <signal.h>
-#include <stdlib.h>
-#include <sys/queue.h>
-
-/* config.h must be included before any other libevent header is included. */
-#include "config.h"
-
-#include "third_party/libevent/event-internal.h"
-#include "third_party/libevent/event.h"
-#include "third_party/libevent/evsignal.h"
-
-
-struct event_base *evsignal_base = 0;
-
-int evsignal_init(struct event_base *base) {
-  /* Do nothing, and return success. */
-  return 0;
-}
-
-void evsignal_process(struct event_base *base) {
-}
-
-int evsignal_add(struct event *event) {
-  /* Do nothing, and return an error. */
-  return -1;
-}
-
-int evsignal_del(struct event *event) {
-  /* Do nothing, and return an error. */
-  return -1;
-}
-
-void evsignal_dealloc(struct event_base *base) {
-}