Add ConstantUse to WorldImpact

tests/compiler/dart2js/type_representation_test.dart

Index: tests/compiler/dart2js/type_representation_test.dart
diff --git a/tests/compiler/dart2js/type_representation_test.dart b/tests/compiler/dart2js/type_representation_test.dart
index 7a7995eeeb94b7d88ee76b096a1a732fdd5ac67f..c09bb2b85cad99e59208b3d497c4231b88d0217d 100644
--- a/tests/compiler/dart2js/type_representation_test.dart
+++ b/tests/compiler/dart2js/type_representation_test.dart
@@ -46,8 +46,11 @@ void testTypeRepresentations() {
         var closedWorldRefiner = env.compiler.closeResolution();
         env.compiler.backend.onCodegenStart(
             closedWorldRefiner.closedWorld,
-            new CodegenWorldBuilderImpl(env.compiler.backend.nativeClassData,
-                closedWorldRefiner.closedWorld, const TypeMaskStrategy()));
+            new CodegenWorldBuilderImpl(
+                env.compiler.backend.nativeClassData,
+                closedWorldRefiner.closedWorld,
+                env.compiler.backend.constants,
+                const TypeMaskStrategy()));
         TypeRepresentationGenerator typeRepresentation =
             new TypeRepresentationGenerator(
                 env.compiler.backend.namer, env.compiler.backend.emitter);