Special case the recording of constant pool entries in the slot buffer.

src/serialize.h

Index: src/serialize.h
diff --git a/src/serialize.h b/src/serialize.h
index 2ad9bb17edbeeb4ab6b856b5341b369fb2d7dc8a..355324e8a665c04592cc6aa51b866ab162ba6e50 100644
--- a/src/serialize.h
+++ b/src/serialize.h
@@ -520,6 +520,7 @@ class Serializer : public SerializerDeserializer {
     void VisitEmbeddedPointer(RelocInfo* target);
     void VisitExternalReference(Address* p);
     void VisitExternalReference(RelocInfo* rinfo);
+    void VisitCodeTarget(Address target);
     void VisitCodeTarget(RelocInfo* target);
     void VisitCodeEntry(Address entry_address);
     void VisitCell(RelocInfo* rinfo);