Handle int constant

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 bc4feb691a1919d7c9898cf77ce464d88ccd6a0c..f0c6aa194e2538680673fed0cbc6f8dc45d7b031 100644
--- a/tests/compiler/dart2js/type_representation_test.dart
+++ b/tests/compiler/dart2js/type_representation_test.dart
@@ -53,7 +53,6 @@ void testTypeRepresentations() {
                 env.compiler.elementEnvironment,
                 env.compiler.backend.nativeBasicData,
                 closedWorld,
-                env.compiler.backend.constants,
                 const TypeMaskStrategy()));
         TypeRepresentationGenerator typeRepresentation =
             new TypeRepresentationGenerator(env.compiler.backend.namer);