move libevent into base

third_party/libevent/event-config.h

Index: third_party/libevent/event-config.h
diff --git a/third_party/libevent/event-config.h b/third_party/libevent/event-config.h
deleted file mode 100644
index c5c0e75d5812b08e9c2c2c08f1aa34ebd3620b58..0000000000000000000000000000000000000000
--- a/third_party/libevent/event-config.h
+++ /dev/null
@@ -1,22 +0,0 @@
-// Copyright (c) 2011 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.
-
-// This file is Chromium-specific, and brings in the appropriate
-// event-config.h depending on your platform.
-
-#if defined(__native_client_nonsfi__)
-#include "third_party/libevent/nacl_nonsfi/event-config.h"
-#elif defined(__APPLE__)
-#include "third_party/libevent/mac/event-config.h"
-#elif defined(ANDROID)
-#include "third_party/libevent/android/event-config.h"
-#elif defined(__linux__)
-#include "third_party/libevent/linux/event-config.h"
-#elif defined(__FreeBSD__)
-#include "third_party/libevent/freebsd/event-config.h"
-#elif defined(__sun)
-#include "third_party/libevent/solaris/event-config.h"
-#else
-#error generate event-config.h for your platform
-#endif