Enable top level inference of instance property gets/sets.

pkg/front_end/testcases/inference/infer_assign_to_ref.dart

Index: pkg/front_end/testcases/inference/infer_assign_to_ref.dart
diff --git a/pkg/front_end/testcases/inference/infer_assign_to_ref.dart b/pkg/front_end/testcases/inference/infer_assign_to_ref.dart
index 9ef7bb7f0e3bd8958681000bebac90b71bdcf9d7..ac6e6330657330e40a4a101e47d82cc83e399b21 100644
--- a/pkg/front_end/testcases/inference/infer_assign_to_ref.dart
+++ b/pkg/front_end/testcases/inference/infer_assign_to_ref.dart
@@ -10,12 +10,9 @@ class A {
 }
 
 A a = new A();
-var /*@topType=dynamic*/ b =
-    (/*error:TOP_LEVEL_UNSUPPORTED*/ a. /*@target=A::f*/ f = 1);

[Siggi Cherem (dart-lang), 2017/06/16 03:40:03]

I wonder if there is value in also keeping the old tests around by passing
another flag to the test framework. For instance, have
testedFeatures=inference_old or =inference_new to toggle the flags and continue
to test the old behavior until it gets deleted.

[Paul Berry, 2017/06/16 03:44:09]

Acknowledged.

 var /*@topType=int*/ c = 0;
 
 main() {
   a;
-  b;
   c;
 }