[snapshot] pass arguments as pointers, not references.

src/snapshot/code-serializer.h

Index: src/snapshot/code-serializer.h
diff --git a/src/snapshot/code-serializer.h b/src/snapshot/code-serializer.h
index 8ed4cf67ac9f9f16a8890e21bd892a3480320084..ebe09ea1cc7292b8dd40ca1406b156145067fa7e 100644
--- a/src/snapshot/code-serializer.h
+++ b/src/snapshot/code-serializer.h
@@ -60,7 +60,7 @@ class SerializedCodeData : public SerializedData {
                                             String* source);
 
   // Used when producing.
-  SerializedCodeData(const List<byte>& payload, const CodeSerializer& cs);
+  SerializedCodeData(const List<byte>* payload, const CodeSerializer* cs);
 
   // Return ScriptData object and relinquish ownership over it to the caller.
   ScriptData* GetScriptData();