Serializer forces flushing of optimized code map.

src/heap/objects-visiting-inl.h

Index: src/heap/objects-visiting-inl.h
diff --git a/src/heap/objects-visiting-inl.h b/src/heap/objects-visiting-inl.h
index 01a38cb5ca5280d564412b252048727f59621b8b..ed6db7b9b4b5f7924f716ab44136f7f0b79881c6 100644
--- a/src/heap/objects-visiting-inl.h
+++ b/src/heap/objects-visiting-inl.h
@@ -409,7 +409,8 @@ void StaticMarkingVisitor<StaticVisitor>::VisitSharedFunctionInfo(
   if (FLAG_cleanup_code_caches_at_gc) {
     shared->ClearTypeFeedbackInfoAtGCTime();
   }
-  if (FLAG_flush_optimized_code_cache &&
+  if ((FLAG_flush_optimized_code_cache ||
+       heap->isolate()->serializer_enabled()) &&
       !shared->optimized_code_map()->IsSmi()) {
     // Always flush the optimized code map if requested by flag.
     shared->ClearOptimizedCodeMap();