Tests for `void`.

pkg/compiler/lib/src/resolution/class_members.dart

Index: pkg/compiler/lib/src/resolution/class_members.dart
diff --git a/pkg/compiler/lib/src/resolution/class_members.dart b/pkg/compiler/lib/src/resolution/class_members.dart
index f2f670b657c0f802aeec0460fd884b8deb1c5bf3..bfa9cf653694483108c05878076e0c000a97df07 100644
--- a/pkg/compiler/lib/src/resolution/class_members.dart
+++ b/pkg/compiler/lib/src/resolution/class_members.dart
@@ -7,6 +7,7 @@ library dart2js.resolution.compute_members;
 import '../common.dart';
 import '../common/names.dart' show Identifiers, Names;
 import '../common/resolution.dart' show Resolution;
+import '../core_types.dart' show CommonElements;
 import '../elements/resolution_types.dart';
 import '../elements/elements.dart'
     show
@@ -192,11 +193,15 @@ abstract class MembersCreator {
           addDeclaredMember(
               name, type, new ResolutionFunctionType.synthesized(type));
           if (!element.isConst && !element.isFinal) {
+            // TODO(floitsch): would be nice to have the voidType directly
+            // on commonElements.
+            ClassElement objectClass = resolution.commonElements.objectClass;
+            ResolutionVoidType voidType = new ResolutionVoidType(objectClass);
             addDeclaredMember(
                 name.setter,
                 type,
                 new ResolutionFunctionType.synthesized(
-                    const ResolutionVoidType(), <ResolutionDartType>[type]));
+                   voidType, <ResolutionDartType>[type]));
           }
         } else if (element.isGetter) {
           ResolutionFunctionType functionType = element.computeType(resolution);
@@ -858,6 +863,8 @@ abstract class ClassMemberMixin implements ClassElement {
   Map<Name, Member> classMembers;
   Map<Name, MemberSignature> interfaceMembers;
 
+  CommonElements commonElements;
+
   /// Creates the necessary maps and [MembersCreator] for compute members of
   /// this class.
   MembersCreator _prepareCreator(Resolution resolution) {
@@ -868,6 +875,7 @@ abstract class ClassMemberMixin implements ClassElement {
         interfaceMembers = new Map<Name, MemberSignature>();
       }
     }
+    commonElements = resolution.commonElements;
     return interfaceMembersAreClassMembers
         ? new ClassMembersCreator(
             resolution, this, computedMemberNames, classMembers)