Support FrozenArray in idl_parser.py

tools/idl_parser/test_parser/interface_web.idl

 /* Copyright (c) 2013 The Chromium Authors. All rights reserved.
    Use of this source code is governed by a BSD-style license that can be
   found in the LICENSE file. */
 
 /* Test Interface productions
 
 Run with --test to generate an AST and verify that all comments accurately
 reflect the state of the Nodes.
 
 BUILD Type(Name)
@@ skipping 351 matching lines @@
   serializer = { getter };
   serializer = { attribute };
   serializer = { inherit, attribute };
   serializer = { inherit };
   serializer = { inherit, name1, name2 };
   serializer = { name1, name2 };
   serializer = [];
   serializer = [getter];
   serializer = [name1, name2];
 };
+
+/* TREE
+ *Interface(MyIfaceFrozenArray)
+ *  Attribute(foo)
+ *    Type()
+ *      FrozenArray()
+ *        Type()
+ *          PrimitiveType(DOMString)
+ */
+interface MyIfaceFrozenArray {
+  readonly attribute FrozenArray<DOMString> foo;
+};