Handle super-method call

pkg/compiler/lib/src/deferred_load.dart

Index: pkg/compiler/lib/src/deferred_load.dart
diff --git a/pkg/compiler/lib/src/deferred_load.dart b/pkg/compiler/lib/src/deferred_load.dart
index c3c4d7acb3b91fff4d5eb6181820c105a62f12d5..47ead89246480f17f4a2c0256cfd327df5dfc315 100644
--- a/pkg/compiler/lib/src/deferred_load.dart
+++ b/pkg/compiler/lib/src/deferred_load.dart
@@ -720,7 +720,7 @@ class DeferredLoadTask extends CompilerTask {
 
               // Now check to see if we have to add more elements due to
               // mirrors.
-              if (compiler.resolution.commonElements.mirrorsLibrary != null) {
+              if (closedWorld.backendUsage.isMirrorsUsed) {
                 _addMirrorElements();
               }