Always visit object class from VisitReferences

We don't want to unload classes which have instances.

Slight increase in CMS GC time from ~6.5s to ~7.3s on
EvaluateAndApplyChanges.

Bug: 22720414
Change-Id: I467ff9c9d55163d2a90b999aef3bdd7b3f648bac
diff --git a/runtime/mirror/object_array-inl.h b/runtime/mirror/object_array-inl.h
index 4a7e7b3..5b73557 100644
--- a/runtime/mirror/object_array-inl.h
+++ b/runtime/mirror/object_array-inl.h
@@ -269,11 +269,8 @@
                       (i * sizeof(HeapReference<Object>)));
 }
 
-template<class T> template<const bool kVisitClass, typename Visitor>
+template<class T> template<typename Visitor>
 void ObjectArray<T>::VisitReferences(const Visitor& visitor) {
-  if (kVisitClass) {
-    visitor(this, ClassOffset(), false);
-  }
   const size_t length = static_cast<size_t>(GetLength());
   for (size_t i = 0; i < length; ++i) {
     visitor(this, OffsetOfElement(i), false);