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pkg/compiler/lib/src/js_backend/mirrors_data.dart

Index: pkg/compiler/lib/src/js_backend/mirrors_data.dart
diff --git a/pkg/compiler/lib/src/js_backend/mirrors_data.dart b/pkg/compiler/lib/src/js_backend/mirrors_data.dart
index a3096128b408e1187399b94d1822897ed30b0e85..1289bc20b9d0038a2c80752118ea4db36bb89789 100644
--- a/pkg/compiler/lib/src/js_backend/mirrors_data.dart
+++ b/pkg/compiler/lib/src/js_backend/mirrors_data.dart
@@ -393,7 +393,8 @@ class MirrorsDataImpl implements MirrorsData, MirrorsDataBuilder {
     } else if (element.isTypedef) {
       return isTypedefAccessibleByReflection(element);
     } else {
-      return isMemberAccessibleByReflection(element);
+      MemberElement member = element;
+      return isMemberAccessibleByReflection(member);
     }
   }
 
@@ -417,7 +418,7 @@ class MirrorsDataImpl implements MirrorsData, MirrorsDataBuilder {
     }
   }
 
-  bool isMemberAccessibleByReflection(MemberElement element) {
+  bool isMemberAccessibleByReflection(MemberEntity element) {
     return _membersNeededForReflection.contains(element);
   }
 
@@ -513,6 +514,14 @@ class MirrorsDataImpl implements MirrorsData, MirrorsDataBuilder {
     return false;
   }
 
+  void createImmutableSets() {
+    _classesNeededForReflection = const ImmutableEmptySet<ClassElement>();
+    _typedefsNeededForReflection = const ImmutableEmptySet<TypedefElement>();
+    _membersNeededForReflection = const ImmutableEmptySet<MemberElement>();
+    _closuresNeededForReflection =
+        const ImmutableEmptySet<LocalFunctionElement>();
+  }
+
   /**
    * Visits all classes and computes whether its members are needed for
    * reflection.
@@ -529,11 +538,7 @@ class MirrorsDataImpl implements MirrorsData, MirrorsDataBuilder {
       ResolutionWorldBuilder worldBuilder, ClosedWorld closedWorld) {
     if (_membersNeededForReflection != null) return;
     if (closedWorld.commonElements.mirrorsLibrary == null) {
-      _classesNeededForReflection = const ImmutableEmptySet<ClassElement>();
-      _typedefsNeededForReflection = const ImmutableEmptySet<TypedefElement>();
-      _membersNeededForReflection = const ImmutableEmptySet<MemberElement>();
-      _closuresNeededForReflection =
-          const ImmutableEmptySet<LocalFunctionElement>();
+      createImmutableSets();
       return;
     }
     _classesNeededForReflection = new Set<ClassElement>();