In constant evaluation, consistently handle const depending on non-const.

pkg/analyzer/test/generated/all_the_rest_test.dart

Index: pkg/analyzer/test/generated/all_the_rest_test.dart
diff --git a/pkg/analyzer/test/generated/all_the_rest_test.dart b/pkg/analyzer/test/generated/all_the_rest_test.dart
index 248ea3d3598e553d2850fb50c540f9f6366cf07d..3e66462b7e2faf39c2f87d6dc0141b6da17b3795 100644
--- a/pkg/analyzer/test/generated/all_the_rest_test.dart
+++ b/pkg/analyzer/test/generated/all_the_rest_test.dart
@@ -8121,7 +8121,7 @@ class ReferenceFinderTest extends EngineTestCase {
   }
   void test_visitSimpleIdentifier_nonConst() {
     _visitNode(_makeTailVariable("v2", false));
-    _assertNoArcs();
+    _assertOneArc(_tail);
   }
   void test_visitSuperConstructorInvocation_const() {
     _visitNode(_makeTailSuperConstructorInvocation("A", true));
@@ -8129,7 +8129,7 @@ class ReferenceFinderTest extends EngineTestCase {
   }
   void test_visitSuperConstructorInvocation_nonConst() {
     _visitNode(_makeTailSuperConstructorInvocation("A", false));
-    _assertNoArcs();
+    _assertOneArc(_tail);
   }
   void test_visitSuperConstructorInvocation_unresolved() {
     SuperConstructorInvocation superConstructorInvocation =