RefBase: Silence compiler warnings

We comment out the names of the parameters we're intentionally
not using.

(cherrypick of 44a0eb4d8cdf4ab881f5d5a1acc1155266a46f6a.)

Change-Id: I0a92d9200ca26cdc4700d2ff9e3ab33c102520d5

include/utils/RefBase.h

@@ -196,9 +196,10 @@ protected:
 
 private:
     friend class ReferenceMover;
-    inline static void renameRefs(size_t n, const ReferenceRenamer& renamer) { }
-    inline static void renameRefId(T* ref,
-            const void* old_id, const void* new_id) { }
+    inline static void renameRefs(size_t /*n*/,
+            const ReferenceRenamer& /*renamer*/) { }
+    inline static void renameRefId(T* /*ref*/,
+            const void* /*old_id*/ , const void* /*new_id*/) { }
 
 private:
     mutable std::atomic<int32_t> mCount;