[turbofan] Add support for loading missing properties.

src/compiler/js-native-context-specialization.h

Index: src/compiler/js-native-context-specialization.h
diff --git a/src/compiler/js-native-context-specialization.h b/src/compiler/js-native-context-specialization.h
index 228f99655cff5d3215b9038df210e1edaa16e547..cd48be765d8d0aa4f2ea43b69527b1d8c7f71ef8 100644
--- a/src/compiler/js-native-context-specialization.h
+++ b/src/compiler/js-native-context-specialization.h
@@ -64,8 +64,8 @@ class JSNativeContextSpecialization final : public AdvancedReducer {
 
   Reduction ReduceNamedAccess(Node* node, Node* value,
                               MapHandleList const& receiver_maps,
-                              Handle<Name> name,
-                              PropertyAccessMode access_mode);
+                              Handle<Name> name, PropertyAccessMode access_mode,
+                              LanguageMode language_mode);
 
   struct ScriptContextTableLookupResult;
   bool LookupInScriptContextTable(Handle<Name> name,