Reenable commented-out test.

pkg/front_end/testcases/inference/assign_local.dart

Index: pkg/front_end/testcases/inference/assign_local.dart
diff --git a/pkg/front_end/testcases/inference/assign_local.dart b/pkg/front_end/testcases/inference/assign_local.dart
index df32dfd63d4fbf038e32ebfba570846e5dda6d72..53ef197ccb801afaca8a4a5c8f44e27f4c655c05 100644
--- a/pkg/front_end/testcases/inference/assign_local.dart
+++ b/pkg/front_end/testcases/inference/assign_local.dart
@@ -14,8 +14,7 @@ main() {
   var /*@type=int*/ x1 = (x = 1);
   var /*@type=double*/ x2 = (x = 1.0);
 
-  // TODO(scheglov) uncomment when constructor inference is implemented.
-//  A<int> y;
-//  var /*@type=A<int>*/ y1 = (y = /*@typeArgs=int*/ new A());
-//  var /*@type=B<int>*/ y2 = (y = /*@typeArgs=int*/ new B());
+  A<int> y;
+  var /*@type=A<int>*/ y1 = (y = new /*@typeArgs=int*/ A());
+  var /*@type=B<int>*/ y2 = (y = new /*@typeArgs=int*/ B());
 }