mac: Expose keychain access frequency to Telemetry.

tools/perf/measurements/session_restore.py

Index: tools/perf/measurements/session_restore.py
diff --git a/tools/perf/measurements/session_restore.py b/tools/perf/measurements/session_restore.py
index 26eef4da60f93f81a0f23c1b66698bf590792eb8..ea91450621de777a8a0c606cd7d6a5c5c4719e8d 100644
--- a/tools/perf/measurements/session_restore.py
+++ b/tools/perf/measurements/session_restore.py
@@ -70,11 +70,10 @@ class SessionRestore(startup.Startup):
 
   def ValidateAndMeasurePage(self, page, tab, results):
     tab.WaitForDocumentReadyStateToBeComplete()
+    super(SessionRestore, self).ValidateAndMeasurePage(page, tab, results)
 
     # Record CPU usage from browser start to when the foreground page is loaded.
     self._cpu_metric.Stop(None, None)
     self._cpu_metric.AddResults(tab, results, 'cpu_utilization')
 
-    startup_metric.StartupMetric().AddResults(tab, results)
-
     # TODO(jeremy): Measure time to load - first, last and frontmost tab here.