move libevent into base

base/message_loop/message_pump_libevent.cc

 // Copyright (c) 2012 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.
 
 #include "base/message_loop/message_pump_libevent.h"
 
 #include <errno.h>
 #include <unistd.h>
 
 #include "base/auto_reset.h"
 #include "base/compiler_specific.h"
 #include "base/files/file_util.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/observer_list.h"
 #include "base/posix/eintr_wrapper.h"
+#include "base/third_party/libevent/event.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
-#include "third_party/libevent/event.h"
 
 #if defined(OS_MACOSX)
 #include "base/mac/scoped_nsautorelease_pool.h"
 #endif
 
 // Lifecycle of struct event
 // Libevent uses two main data structures:
 // struct event_base (of which there is one per message pump), and
 // struct event (of which there is roughly one per socket).
 // The socket's struct event is created in
@@ skipping 343 matching lines @@
   // Remove and discard the wakeup byte.
   char buf;
   int nread = HANDLE_EINTR(read(socket, &buf, 1));
   DCHECK_EQ(nread, 1);
   that->processed_io_events_ = true;
   // Tell libevent to break out of inner loop.
   event_base_loopbreak(that->event_base_);
 }
 
 }  // namespace base