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

cycle_breaker_unittest.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 <set>
 #include <string>
 #include <utility>
 #include <vector>
 #include <gtest/gtest.h>
-#include "chromeos/obsolete_logging.h"
+#include "base/logging.h"
 #include "update_engine/cycle_breaker.h"
 #include "update_engine/graph_types.h"
 #include "update_engine/utils.h"
 
 using std::make_pair;
 using std::pair;
 using std::set;
 using std::string;
 using std::vector;
 
@@ skipping 199 matching lines @@
   
   set<Edge> broken_edges;
   breaker.BreakCycles(graph, &broken_edges);
 
   // These are required to be broken:
   EXPECT_TRUE(utils::SetContainsKey(broken_edges, make_pair(n_a, n_b)));
   EXPECT_TRUE(utils::SetContainsKey(broken_edges, make_pair(n_a, n_c)));
 }
 
 }  // namespace chromeos_update_engine