NOT FOR SUBMIT: use counters for jdm@

third_party/WebKit/Source/core/timing/PerformanceNavigation.idl

 /*
  * Copyright (C) 2010 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 21 matching lines @@
 
 // Legacy support for NT1(https://www.w3.org/TR/navigation-timing/).
 
 [
     Exposed=Window,
 ] interface PerformanceNavigation {
     const unsigned short TYPE_NAVIGATE = 0;
     const unsigned short TYPE_RELOAD = 1;
     const unsigned short TYPE_BACK_FORWARD = 2;
     const unsigned short TYPE_RESERVED = 255;
-    readonly attribute unsigned short type;
-    readonly attribute unsigned short redirectCount;
+    [Measure] readonly attribute unsigned short type;
+    [Measure] readonly attribute unsigned short redirectCount;
     serializer = {attribute};
 };