Convert the few remaining ARRAYSIZE_UNSAFE -> arraysize.

chromeos/network/network_change_notifier_chromeos_unittest.cc

Index: chromeos/network/network_change_notifier_chromeos_unittest.cc
diff --git a/chromeos/network/network_change_notifier_chromeos_unittest.cc b/chromeos/network/network_change_notifier_chromeos_unittest.cc
index 04d549fc2ec17e99446597c2fb81b81c6916b220..e1b8d789a703610f2cc856eb3d69a61d456032df 100644
--- a/chromeos/network/network_change_notifier_chromeos_unittest.cc
+++ b/chromeos/network/network_change_notifier_chromeos_unittest.cc
@@ -92,7 +92,7 @@ TEST(NetworkChangeNotifierChromeosTest, ConnectionTypeFromShill) {
       NetworkChangeNotifier::CONNECTION_2G }
   };
 
-  for (size_t i = 0; i < ARRAYSIZE_UNSAFE(type_mappings); ++i) {
+  for (size_t i = 0; i < arraysize(type_mappings); ++i) {
     NetworkChangeNotifier::ConnectionType type =
         NetworkChangeNotifierChromeos::ConnectionTypeFromShill(
             type_mappings[i].shill_type, type_mappings[i].technology);