Handle const constructor invocation in kernel_impact.

pkg/compiler/lib/src/enqueue.dart

Index: pkg/compiler/lib/src/enqueue.dart
diff --git a/pkg/compiler/lib/src/enqueue.dart b/pkg/compiler/lib/src/enqueue.dart
index d80f4e470548e577891189069b95425df46f4a0c..271e3eccc8e657dba3f2eefdeb8695d77ac5090e 100644
--- a/pkg/compiler/lib/src/enqueue.dart
+++ b/pkg/compiler/lib/src/enqueue.dart
@@ -596,6 +596,10 @@ class ResolutionEnqueuer extends Enqueuer {
       case StaticUseKind.SUPER_TEAR_OFF:
       case StaticUseKind.GENERAL:
         break;
+      case StaticUseKind.CONSTRUCTOR_INVOKE:
+      case StaticUseKind.CONST_CONSTRUCTOR_INVOKE:
+        registerTypeUse(new TypeUse.instantiation(staticUse.type));
+        break;
     }
     if (addElement) {
       addToWorkList(element);
@@ -608,7 +612,6 @@ class ResolutionEnqueuer extends Enqueuer {
       case TypeUseKind.INSTANTIATION:
         registerInstantiatedType(type);
         break;
-      case TypeUseKind.INSTANTIATION:
       case TypeUseKind.IS_CHECK:
       case TypeUseKind.AS_CAST:
       case TypeUseKind.CATCH_TYPE: