[parser/ast] Reduce memory consumption for AstConsString.

src/parsing/func-name-inferrer.cc

Index: src/parsing/func-name-inferrer.cc
diff --git a/src/parsing/func-name-inferrer.cc b/src/parsing/func-name-inferrer.cc
index 8266df4bbc0cbc47893485aaabc4d145411ba0d6..e9736165340cf8f238e166b421b20b08227525e7 100644
--- a/src/parsing/func-name-inferrer.cc
+++ b/src/parsing/func-name-inferrer.cc
@@ -64,9 +64,9 @@ const AstConsString* FuncNameInferrer::MakeNameFromStack() {
     }
     // Add name. Separate names with ".".
     if (!result->IsEmpty()) {
-      result->AddString(ast_value_factory_->dot_string());
+      result->AddString(zone(), ast_value_factory_->dot_string());
     }
-    result->AddString(names_stack_.at(pos).name);
+    result->AddString(zone(), names_stack_.at(pos).name);
   }
   return result;
 }