Reenable commented-out test.

pkg/front_end/testcases/inference/assign_local.dart.strong.expect

Index: pkg/front_end/testcases/inference/assign_local.dart.strong.expect
diff --git a/pkg/front_end/testcases/inference/assign_local.dart.strong.expect b/pkg/front_end/testcases/inference/assign_local.dart.strong.expect
index e3529d7e2021c56cce60a62977230aa3f61bc00d..65cd64465cfb2f3e7a0855be7f92c8d49fdb1d33 100644
--- a/pkg/front_end/testcases/inference/assign_local.dart.strong.expect
+++ b/pkg/front_end/testcases/inference/assign_local.dart.strong.expect
@@ -16,4 +16,7 @@ static method main() → dynamic {
   core::num x;
   core::int x1 = x = 1;
   core::double x2 = x = 1.0;
+  self::A<core::int> y;
+  self::A<core::int> y1 = y = new self::A::•<core::int>();
+  self::B<core::int> y2 = y = new self::B::•<core::int>();
 }