Added a Isolate* parameter to Serializer::enabled().

src/objects-visiting-inl.h

Index: src/objects-visiting-inl.h
diff --git a/src/objects-visiting-inl.h b/src/objects-visiting-inl.h
index 92fb393872336745c4d2c6d2ab68297c0c111488..78fe92bac3e4d004a36ab4ada9115595444d8646 100644
--- a/src/objects-visiting-inl.h
+++ b/src/objects-visiting-inl.h
@@ -289,10 +289,10 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCodeTarget(
   if (FLAG_cleanup_code_caches_at_gc && target->is_inline_cache_stub()
       && (target->ic_state() == MEGAMORPHIC || target->ic_state() == GENERIC ||
           target->ic_state() == POLYMORPHIC || heap->flush_monomorphic_ics() ||
-          Serializer::enabled() || target->ic_age() != heap->global_ic_age() ||
+          Serializer::enabled(heap->isolate()) ||
+          target->ic_age() != heap->global_ic_age() ||
           target->is_invalidated_weak_stub())) {
-    IC::Clear(target->GetIsolate(), rinfo->pc(),
-              rinfo->host()->constant_pool());
+    IC::Clear(heap->isolate(), rinfo->pc(), rinfo->host()->constant_pool());
     target = Code::GetCodeFromTargetAddress(rinfo->target_address());
   }
   heap->mark_compact_collector()->RecordRelocSlot(rinfo, target);
@@ -408,7 +408,7 @@ void StaticMarkingVisitor<StaticVisitor>::VisitCode(
   if (FLAG_cleanup_code_caches_at_gc) {
     code->ClearTypeFeedbackInfo(heap);
   }
-  if (FLAG_age_code && !Serializer::enabled()) {
+  if (FLAG_age_code && !Serializer::enabled(heap->isolate())) {
     code->MakeOlder(heap->mark_compact_collector()->marking_parity());
   }
   code->CodeIterateBody<StaticVisitor>(heap);