Small fixes to top level type inference.

pkg/front_end/testcases/inference_new/downwards_inference_inside_top_level_2.dart

Index: pkg/front_end/testcases/inference_new/downwards_inference_inside_top_level_2.dart
diff --git a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr2.dart b/pkg/front_end/testcases/inference_new/downwards_inference_inside_top_level_2.dart
similarity index 61%
copy from pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr2.dart
copy to pkg/front_end/testcases/inference_new/downwards_inference_inside_top_level_2.dart
index cdae18320ec55b10bfda61c45dae92196d2f9744..ec0be4d4e384c4ec777e48b5edb7838897ce5e6b 100644
--- a/pkg/front_end/testcases/inference/unsafe_block_closure_inference_function_call_explicit_type_param_via_expr2.dart
+++ b/pkg/front_end/testcases/inference_new/downwards_inference_inside_top_level_2.dart
@@ -5,11 +5,13 @@
 /*@testedFeatures=inference*/
 library test;
 
-List<T> f<T>(T g()) => <T>[g()];
-var /*@topType=dynamic*/ v = (f) /*@typeArgs=int*/ (/*@returnType=int*/ () {
-  return 1;
-});
-
-main() {
-  v;
+class A<T> {
+  A(T x);
 }
+
+var /*@topType=List<A<int>>*/ t2 = /*@typeArgs=A<int>*/ [
+  new
+      /*error:TOP_LEVEL_TYPE_ARGUMENTS*/ /*@typeArgs=int*/ A(2)
+];
+
+main() {}