NOT FOR SUBMIT: use counters for jdm@

third_party/WebKit/Source/core/timing/PerformanceTiming.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 17 matching lines @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 // https://w3c.github.io/navigation-timing/#the-performancetiming-interface
 
 // Legacy support for NT1(https://www.w3.org/TR/navigation-timing/).
 
 [
     Exposed=Window,
 ] interface PerformanceTiming {
-    readonly attribute unsigned long long navigationStart;
-    readonly attribute unsigned long long unloadEventStart;
-    readonly attribute unsigned long long unloadEventEnd;
-    readonly attribute unsigned long long redirectStart;
-    readonly attribute unsigned long long redirectEnd;
-    readonly attribute unsigned long long fetchStart;
-    readonly attribute unsigned long long domainLookupStart;
-    readonly attribute unsigned long long domainLookupEnd;
-    readonly attribute unsigned long long connectStart;
-    readonly attribute unsigned long long connectEnd;
-    readonly attribute unsigned long long secureConnectionStart;
-    readonly attribute unsigned long long requestStart;
-    readonly attribute unsigned long long responseStart;
-    readonly attribute unsigned long long responseEnd;
-    readonly attribute unsigned long long domLoading;
-    readonly attribute unsigned long long domInteractive;
-    readonly attribute unsigned long long domContentLoadedEventStart;
-    readonly attribute unsigned long long domContentLoadedEventEnd;
-    readonly attribute unsigned long long domComplete;
-    readonly attribute unsigned long long loadEventStart;
-    readonly attribute unsigned long long loadEventEnd;
+    [Measure] readonly attribute unsigned long long navigationStart;
+    [Measure] readonly attribute unsigned long long unloadEventStart;
+    [Measure] readonly attribute unsigned long long unloadEventEnd;
+    [Measure] readonly attribute unsigned long long redirectStart;
+    [Measure] readonly attribute unsigned long long redirectEnd;
+    [Measure] readonly attribute unsigned long long fetchStart;
+    [Measure] readonly attribute unsigned long long domainLookupStart;
+    [Measure] readonly attribute unsigned long long domainLookupEnd;
+    [Measure] readonly attribute unsigned long long connectStart;
+    [Measure] readonly attribute unsigned long long connectEnd;
+    [Measure] readonly attribute unsigned long long secureConnectionStart;
+    [Measure] readonly attribute unsigned long long requestStart;
+    [Measure] readonly attribute unsigned long long responseStart;
+    [Measure] readonly attribute unsigned long long responseEnd;
+    [Measure] readonly attribute unsigned long long domLoading;
+    [Measure] readonly attribute unsigned long long domInteractive;
+    [Measure] readonly attribute unsigned long long domContentLoadedEventStart;
+    [Measure] readonly attribute unsigned long long domContentLoadedEventEnd;
+    [Measure] readonly attribute unsigned long long domComplete;
+    [Measure] readonly attribute unsigned long long loadEventStart;
+    [Measure] readonly attribute unsigned long long loadEventEnd;
     serializer = {attribute};
 };