Cleanup change.

runtime/vm/parser.cc

Index: runtime/vm/parser.cc
diff --git a/runtime/vm/parser.cc b/runtime/vm/parser.cc
index 20ab695405b4df8ebd5c0bf1a742b9424a1f3918..23ca9317e3d68753a6981d935d120a7f088af64b 100644
--- a/runtime/vm/parser.cc
+++ b/runtime/vm/parser.cc
@@ -13474,7 +13474,7 @@ AstNode* Parser::ParseListLiteral(TokenPosition type_pos,
       if (I->type_checks() && !element_type.IsDynamicType() &&
           (!elem->AsLiteralNode()->literal().IsNull() &&
            !elem->AsLiteralNode()->literal().IsInstanceOf(
-               element_type, TypeArguments::Handle(Z), &bound_error))) {
+               element_type, Object::null_type_arguments(), &bound_error))) {
         // If the failure is due to a bound error, display it instead.
         if (!bound_error.IsNull()) {
           ReportError(bound_error);
@@ -14311,8 +14311,8 @@ AstNode* Parser::ParseNewOperator(Token::Kind op_kind) {
       ASSERT(!type_bound.IsMalformed());
       Error& bound_error = Error::Handle(Z);
       ASSERT(!is_top_level_);  // We cannot check unresolved types.
-      if (!const_instance.IsInstanceOf(type_bound, TypeArguments::Handle(Z),
-                                       &bound_error)) {
+      if (!const_instance.IsInstanceOf(
+              type_bound, Object::null_type_arguments(), &bound_error)) {
         type_bound = ClassFinalizer::NewFinalizedMalformedType(
             bound_error, script_, new_pos,
             "const factory result is not an instance of '%s'",