Port r9543 to the 3.4 branch.

src/parser.cc

Index: src/parser.cc
diff --git a/src/parser.cc b/src/parser.cc
index 830e2dd0faee7a3b76844c3a5d964439bef92dae..ece0cfeaec142d58991fd6037b51f8f9e27d6a2f 100644
--- a/src/parser.cc
+++ b/src/parser.cc
@@ -5121,12 +5121,15 @@ bool ParserApi::Parse(CompilationInfo* info) {
   FunctionLiteral* result = NULL;
   Handle<Script> script = info->script();
   if (info->is_lazy()) {
-    Parser parser(script, true, NULL, NULL);
+    bool allow_natives_syntax =
+        FLAG_allow_natives_syntax ||
+        info->is_native();
+    Parser parser(script, allow_natives_syntax, NULL, NULL);
     result = parser.ParseLazy(info);
   } else {
     // Whether we allow %identifier(..) syntax.
     bool allow_natives_syntax =
-        info->allows_natives_syntax() || FLAG_allow_natives_syntax;
+        info->is_native() || FLAG_allow_natives_syntax;
     ScriptDataImpl* pre_data = info->pre_parse_data();
     Parser parser(script, allow_natives_syntax, info->extension(), pre_data);
     if (pre_data != NULL && pre_data->has_error()) {