Expose connection subtype from NetworkChangeNotifier

net/base/network_change_notifier_unittest.cc

Index: net/base/network_change_notifier_unittest.cc
diff --git a/net/base/network_change_notifier_unittest.cc b/net/base/network_change_notifier_unittest.cc
index 674260789a6986e1fae1627389a56b08d75feb2c..c06d3588808eb95ec237b17a6b7afe438bd24f06 100644
--- a/net/base/network_change_notifier_unittest.cc
+++ b/net/base/network_change_notifier_unittest.cc
@@ -123,4 +123,9 @@ TEST(NetworkChangeNotifierTest, IgnoreVMInterfaces) {
             NetworkChangeNotifier::ConnectionTypeFromInterfaceList(list));
 }
 
+TEST(NetworkChangeNotifierTest, GetConnectionSubtype) {
+  // Call GetConnectionSubtype() and ensure that there is no crash.
+  NetworkChangeNotifier::GetConnectionSubtype();
+}
+
 }  // namespace net