Revert "Fix an outstanding compaction bug in interpreter."

This reverts commit e09ae0920be57760fb390b6944bce420fa0b5582.

Change-Id: I48036306130d5ccfec683d0dc3e9a642a02ee9c1
diff --git a/runtime/monitor.cc b/runtime/monitor.cc
index fe1ef6c..f783edb 100644
--- a/runtime/monitor.cc
+++ b/runtime/monitor.cc
@@ -637,7 +637,7 @@
   }
 }
 
-void Monitor::InflateThinLocked(Thread* self, Handle<mirror::Object> obj, LockWord lock_word,
+void Monitor::InflateThinLocked(Thread* self, Handle<mirror::Object>& obj, LockWord lock_word,
                                 uint32_t hash_code) {
   DCHECK_EQ(lock_word.GetState(), LockWord::kThinLocked);
   uint32_t owner_thread_id = lock_word.ThinLockOwner();