Fix closehelpers.js missing object namespace

Change-Id: Ib090cc1373146008233428c0747bbf209e2e02d2
diff --git a/user/src/com/google/gwt/junit/linker/closurehelpers.js b/user/src/com/google/gwt/junit/linker/closurehelpers.js
index 8dbf977..5c397c1 100644
--- a/user/src/com/google/gwt/junit/linker/closurehelpers.js
+++ b/user/src/com/google/gwt/junit/linker/closurehelpers.js
@@ -5,8 +5,9 @@
 
 goog.global = this;
 goog.implicitNamespaces_ = {};
+goog.object = {};
 
-goog.object.createSet = function goog$object$createSet() {
+goog.object.createSet = function() {
   var result = {};
   for (var i = 0; i < arguments.length; i++) {
     result[arguments[i]] = true;