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

BUG=None
TEST=compile

Change-Id: Ieed8952b6806a72b59e16c1579f7293b6a98157a

Review URL: http://codereview.chromium.org/3170010
diff --git a/test_utils.cc b/test_utils.cc
index a075c2d..c1bdb48 100644
--- a/test_utils.cc
+++ b/test_utils.cc
@@ -16,7 +16,7 @@
 #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"