Cleanup registration of closures

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

Index: pkg/compiler/lib/src/js_backend/impact_transformer.dart
diff --git a/pkg/compiler/lib/src/js_backend/impact_transformer.dart b/pkg/compiler/lib/src/js_backend/impact_transformer.dart
index 128a78cdb17fceebeac6eb315b152066ce01e36e..b5d0fa7ef2f725a72094f172785b0fb4120a65c7 100644
--- a/pkg/compiler/lib/src/js_backend/impact_transformer.dart
+++ b/pkg/compiler/lib/src/js_backend/impact_transformer.dart
@@ -382,7 +382,7 @@ class JavaScriptImpactTransformer extends ImpactTransformer {
       switch (staticUse.kind) {
         case StaticUseKind.CLOSURE:
           LocalFunctionElement closure = staticUse.element;
-          if (backend.rtiNeed.methodNeedsRti(closure)) {
+          if (backend.rtiNeed.localFunctionNeedsRti(closure)) {
             impacts.computeSignature
                 .registerImpact(transformed, elementEnvironment);
           }