[heap] Set class RememberedSet to AllStatic

src/heap/remembered-set.h

Index: src/heap/remembered-set.h
diff --git a/src/heap/remembered-set.h b/src/heap/remembered-set.h
index 2b851158009818fec006e8dbdb4c0a59f3122a2f..cf17a46821ed869f7051fa7cd8a7aff14bc4c0b5 100644
--- a/src/heap/remembered-set.h
+++ b/src/heap/remembered-set.h
@@ -17,7 +17,7 @@ enum PointerDirection { OLD_TO_OLD, OLD_TO_NEW };
 
 // TODO(ulan): Investigate performance of de-templatizing this class.
 template <PointerDirection direction>
-class RememberedSet {
+class RememberedSet : public AllStatic {
  public:
   // Given a page and a slot in that page, this function adds the slot to the
   // remembered set.