Restore tmp function

dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart

Index: dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
diff --git a/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart b/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
index c456ece3ece97b5bdc5db290533fd7579806147b..80a6e7402377046c8c993bf782297cc4238b25b6 100644
--- a/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
+++ b/dart/pkg/compiler/lib/src/js_emitter/old_emitter/emitter.dart
@@ -312,9 +312,11 @@ class OldEmitter implements Emitter {
   jsAst.Expression buildInheritFrom() {
     jsAst.Expression result = js(r'''
         function() {
+          function tmp() {}
           var hasOwnProperty = Object.prototype.hasOwnProperty;
           return function (constructor, superConstructor) {
-            var object = Object.create(superConstructor.prototype);
+            tmp.prototype = superConstructor.prototype;
+            var object = new tmp();
             var properties = constructor.prototype;
             for (var member in properties) {
               if (hasOwnProperty.call(properties, member)) {