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

filesystem_iterator.cc

 // Copyright (c) 2009 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 "update_engine/filesystem_iterator.h"
 #include <sys/types.h>
 #include <dirent.h>
 #include <errno.h>
 #include <set>
 #include <string>
 #include <vector>
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "update_engine/utils.h"
 
 using std::set;
 using std::string;
 using std::vector;
 
 namespace chromeos_update_engine {
 
 // We use a macro here for two reasons:
 // 1. We want to be able to return from the caller's function.
@@ skipping 115 matching lines @@
         is_end_ = true;
         return;
       }
       CHECK(!names_.empty());
       names_.pop_back();
     }
   }
 }
 
 }  //   namespace chromeos_update_engine