move libevent into base

third_party/libevent/BUILD.gn

Index: third_party/libevent/BUILD.gn
diff --git a/third_party/libevent/BUILD.gn b/third_party/libevent/BUILD.gn
deleted file mode 100644
index 61be1d788d84f4fdb95d8c1af511a31dbae1b6fd..0000000000000000000000000000000000000000
--- a/third_party/libevent/BUILD.gn
+++ /dev/null
@@ -1,56 +0,0 @@
-# Copyright (c) 2013 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.
-
-import("//build/config/nacl/config.gni")
-
-source_set("libevent") {
-  sources = [
-    "buffer.c",
-    "evbuffer.c",
-    "evdns.c",
-    "event.c",
-    "event_tagging.c",
-    "evrpc.c",
-    "evutil.c",
-    "http.c",
-    "log.c",
-    "poll.c",
-    "select.c",
-    "signal.c",
-    "strlcpy.c",
-  ]
-
-  defines = [ "HAVE_CONFIG_H" ]
-
-  if (is_mac || is_ios) {
-    sources += [ "kqueue.c" ]
-    include_dirs = [ "mac" ]
-  } else if (is_linux) {
-    sources += [ "epoll.c" ]
-    include_dirs = [ "linux" ]
-    libs = [ "rt" ]
-  } else if (is_android) {
-    sources += [ "epoll.c" ]
-    include_dirs = [ "android" ]
-  } else if (is_nacl_nonsfi) {
-    sources -= [
-      "evdns.c",
-      "event_tagging.c",
-      "evrpc.c",
-      "http.c",
-      "select.c",
-      "signal.c",
-    ]
-    sources += [
-      "nacl_nonsfi/config.h",
-      "nacl_nonsfi/event-config.h",
-      "nacl_nonsfi/random.c",
-      "nacl_nonsfi/signal_stub.c",
-    ]
-    include_dirs = [ "nacl_nonsfi" ]
-  }
-
-  configs -= [ "//build/config/compiler:chromium_code" ]
-  configs += [ "//build/config/compiler:no_chromium_code" ]
-}