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

test_utils.cc

 // Copyright (c) 2009 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 "update_engine/test_utils.h"
 
 #include <sys/stat.h>
 #include <sys/types.h>
 #include <errno.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <unistd.h>
 
 #include <set>
 #include <string>
 #include <vector>
 
 #include "base/string_util.h"
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "update_engine/file_writer.h"
 #include "update_engine/filesystem_iterator.h"
 #include "update_engine/utils.h"
 
 using std::set;
 using std::string;
 using std::vector;
 
 namespace chromeos_update_engine {
 
@@ skipping 227 matching lines @@
   EXPECT_TRUE(expected_paths.empty());
   if (!expected_paths.empty()) {
     for (set<string>::const_iterator it = expected_paths.begin();
          it != expected_paths.end(); ++it) {
       LOG(INFO) << "extra path: " << *it;
     }
   }
 }
 
 }  // namespace chromeos_update_engine