Insert the right checks for redirecting factories to deferred constructors.

tests/language/deferred_inheritance_constraints_test.dart

Index: tests/language/deferred_inheritance_constraints_test.dart
diff --git a/tests/language/deferred_inheritance_constraints_test.dart b/tests/language/deferred_inheritance_constraints_test.dart
index 8fb023c44cf51b1360266d8d1542c22c250b7508..ff009e69fcfc16fbc859cb4cfe5942b19f4c5d56 100644
--- a/tests/language/deferred_inheritance_constraints_test.dart
+++ b/tests/language/deferred_inheritance_constraints_test.dart
@@ -22,7 +22,7 @@ class C = C1 with
 class D { 
   D() ;
   factory D.factory() = 
-    lib. /// redirecting_constructor: static type warning, runtime error
+    lib. /// redirecting_constructor: static type warning
     Foo2;
 }
 
@@ -30,5 +30,7 @@ void main() {
   new A();
   new B();
   new C();
-  new D.factory();
+  Expect.throws(() { /// redirecting_constructor: continued
+    new D.factory();
+  }); /// redirecting_constructor: continued
 }