Revert "Revert "ART: Extracts an utility function of the duplicated code""

This reverts commit b5a14d2a6c18c1ea3c019c53b10af2e8f5dea234.

Change-Id: Id09a4cc27ac22db940badf3a277848b38b173eae
diff --git a/runtime/mirror/object_array.h b/runtime/mirror/object_array.h
index 5ff0490..26b1fd1 100644
--- a/runtime/mirror/object_array.h
+++ b/runtime/mirror/object_array.h
@@ -83,9 +83,9 @@
   template<const bool kVisitClass, typename Visitor>
   void VisitReferences(const Visitor& visitor) NO_THREAD_SAFETY_ANALYSIS;
 
- private:
   static MemberOffset OffsetOfElement(int32_t i);
 
+ private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(ObjectArray);
 };