Reify type params on map literals

test/codegen_expected/language/parse_closures_in_initializers_test.js

Index: test/codegen_expected/language/parse_closures_in_initializers_test.js
diff --git a/test/codegen_expected/language/parse_closures_in_initializers_test.js b/test/codegen_expected/language/parse_closures_in_initializers_test.js
index cc7d105797d3869c379ddc4804f84b7bb5c460b9..1fdb9be79c8b9ff78c60b855e5a65a7a237d32b6 100644
--- a/test/codegen_expected/language/parse_closures_in_initializers_test.js
+++ b/test/codegen_expected/language/parse_closures_in_initializers_test.js
@@ -26,7 +26,7 @@ dart_library.library('language/parse_closures_in_initializers_test', null, /* Im
       this.x = JSArrayOfVoidTodynamic().of([dart.fn(() => y, VoidTodynamic$())]);
     }
     mapLiteral(y) {
-      this.x = dart.map({fun: dart.fn(() => y, VoidTodynamic$())});
+      this.x = dart.map({fun: dart.fn(() => y, VoidTodynamic$())}, core.String, VoidTodynamic());
     }
     arg(y) {
       this.x = parse_closures_in_initializers_test.A.foo(dart.fn(() => y, VoidTodynamic$()));