WIP: prototype ffi support

src/snapshot/code-serializer.cc

Index: src/snapshot/code-serializer.cc
diff --git a/src/snapshot/code-serializer.cc b/src/snapshot/code-serializer.cc
index 8115090b0a39d8112e809ebc88384463a18480c2..7750697df1358cf3e2ac47fbfa02fc53824e5fdd 100644
--- a/src/snapshot/code-serializer.cc
+++ b/src/snapshot/code-serializer.cc
@@ -83,6 +83,7 @@ void CodeSerializer::SerializeObject(HeapObject* obj, HowToCode how_to_code,
       case Code::WASM_FUNCTION:
       case Code::WASM_TO_JS_FUNCTION:
       case Code::JS_TO_WASM_FUNCTION:
+      case Code::JS_TO_NATIVE_FUNCTION:
         UNREACHABLE();
     }
     UNREACHABLE();