Move reference processor and mirror::Reference to ObjPtr

Bug: 31113334

Test: test-art-host

Change-Id: I2c7c3dfd88ebf12a0de271436f8a7781f997e061
diff --git a/runtime/gc/reference_queue_test.cc b/runtime/gc/reference_queue_test.cc
index 5b8a3c2..3ca3353 100644
--- a/runtime/gc/reference_queue_test.cc
+++ b/runtime/gc/reference_queue_test.cc
@@ -52,10 +52,10 @@
 
   std::set<mirror::Reference*> refs = {ref1.Get(), ref2.Get()};
   std::set<mirror::Reference*> dequeued;
-  dequeued.insert(queue.DequeuePendingReference());
+  dequeued.insert(queue.DequeuePendingReference().Ptr());
   ASSERT_TRUE(!queue.IsEmpty());
   ASSERT_EQ(queue.GetLength(), 1U);
-  dequeued.insert(queue.DequeuePendingReference());
+  dequeued.insert(queue.DequeuePendingReference().Ptr());
   ASSERT_EQ(queue.GetLength(), 0U);
   ASSERT_TRUE(queue.IsEmpty());
   ASSERT_EQ(refs, dequeued);