Expose toString() as enumerable on some objects.

third_party/WebKit/Source/core/dom/URLUtilsReadOnly.idl

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 11 matching lines @@
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // https://url.spec.whatwg.org/#urlutilsreadonly
 
 [
     NoInterfaceObject, // Always used on target of 'implements'
     Exposed=(Window,Worker),
 ] interface URLUtilsReadOnly {
-    // FIXME: should be stringifier: http://crbug.com/306606
-    // stringifier readonly attribute USVString href;
-    readonly attribute USVString href;
-    [NotEnumerable, ImplementedAs=href] USVString toString();
+    stringifier readonly attribute USVString href;
     readonly attribute USVString origin;
 
     readonly attribute USVString protocol;
     readonly attribute USVString host;
     readonly attribute USVString hostname;
     readonly attribute USVString port;
     readonly attribute USVString pathname;
     readonly attribute USVString search;
     readonly attribute USVString hash;
 };