[serializer] pass internal fields deserializer callback as argument.

src/snapshot/partial-serializer.cc

 // Copyright 2016 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/snapshot/partial-serializer.h"
 #include "src/snapshot/startup-serializer.h"
 
 #include "src/objects-inl.h"
 
 namespace v8 {
@@ skipping 84 matching lines @@
     JSFunction* function = JSFunction::cast(obj);
     LiteralsArray* literals = function->literals();
     for (int i = 0; i < literals->literals_count(); i++) {
       literals->set_literal_undefined(i);
     }
     function->ClearTypeFeedbackInfo();
   }
 
   if (obj->IsJSObject()) {
     JSObject* jsobj = JSObject::cast(obj);
-    if (jsobj->GetInternalFieldCount() > 0) internal_field_holders_.Add(jsobj);
+    if (jsobj->GetInternalFieldCount() > 0) {
+      DCHECK_NOT_NULL(serialize_internal_fields_);
+      internal_field_holders_.Add(jsobj);
+    }
   }
 
   // Object has not yet been serialized.  Serialize it here.
   ObjectSerializer serializer(this, obj, &sink_, how_to_code, where_to_point);
   serializer.Serialize();
 }
 
 bool PartialSerializer::ShouldBeInThePartialSnapshotCache(HeapObject* o) {
   // Scripts should be referred only through shared function infos.  We can't
   // allow them to be part of the partial snapshot because they contain a
@@ skipping 31 matching lines @@
       sink_.PutRaw(reinterpret_cast<const byte*>(data.data), data.raw_size,
                    "internal fields data");
       delete[] data.data;
     }
   }
   sink_.Put(kSynchronize, "Finished with internal fields data");
 }
 
 }  // namespace internal
 }  // namespace v8