[update_engine] Update to use not-hideously-old logging API from chrome

main.cc

 // Copyright (c) 2010 The Chromium OS 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 <string>
 #include <tr1/memory>
 #include <vector>
 
 #include <gflags/gflags.h>
 #include <glib.h>
 
 #include "base/command_line.h"
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "metrics/metrics_library.h"
 #include "update_engine/dbus_constants.h"
 #include "update_engine/dbus_service.h"
 #include "update_engine/prefs.h"
 #include "update_engine/update_attempter.h"
 #include "update_engine/utils.h"
 
 extern "C" {
 #include "update_engine/update_engine.dbusserver.h"
 }
@@ skipping 127 matching lines @@
   g_main_loop_run(loop);
 
   // Cleanup:
   g_main_loop_unref(loop);
   update_attempter.set_dbus_service(NULL);
   g_object_unref(G_OBJECT(service));
 
   LOG(INFO) << "Chrome OS Update Engine terminating";
   return 0;
 }