Register created closure class with the world.

pkg/compiler/lib/src/closure.dart

Index: pkg/compiler/lib/src/closure.dart
diff --git a/pkg/compiler/lib/src/closure.dart b/pkg/compiler/lib/src/closure.dart
index 00311f09afcac9fb50742af359a1aa432e5ccfd9..5a94e8555e84cbaea0837a59250cff47b674f400 100644
--- a/pkg/compiler/lib/src/closure.dart
+++ b/pkg/compiler/lib/src/closure.dart
@@ -1378,7 +1378,7 @@ class ClosureTranslator extends Visitor {
     ClosureClassElement globalizedElement =
         new ClosureClassElement(node, closureName, compiler, element);
     // Extend [globalizedElement] as an instantiated class in the closed world.
-    closedWorldRefiner.registerClosureClass(globalizedElement);
+    closedWorldRefiner.registerClosureClass(globalizedElement, false);
     MethodElement callElement = new SynthesizedCallMethodElementX(
         Identifiers.call, element, globalizedElement, node, elements);
     backend.mirrorsDataBuilder.maybeMarkClosureAsNeededForReflection(