mac: Expose keychain access frequency to Telemetry.

tools/perf/measurements/startup.py

Index: tools/perf/measurements/startup.py
diff --git a/tools/perf/measurements/startup.py b/tools/perf/measurements/startup.py
index 6d26ee92a1a1b00e43ea42752d15bb2a18366dd9..a65ea9efb240f71633ac77f38ad8749f2b1dc55c 100644
--- a/tools/perf/measurements/startup.py
+++ b/tools/perf/measurements/startup.py
@@ -2,11 +2,11 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
+from measurements import PageTestMeasurement
 from metrics import startup_metric
-from telemetry.page import page_test
 
 
-class Startup(page_test.PageTest):
+class Startup(PageTestMeasurement):
   """Performs a measurement of Chromium's startup performance.
 
   This test must be invoked with either --warm or --cold on the command line. A
@@ -35,6 +35,7 @@ class Startup(page_test.PageTest):
     #   parser.error('You must specify either --warm or --cold')
 
   def CustomizeBrowserOptions(self, options):
+    super(Startup, self).CustomizeBrowserOptions(options)
     if self._cold:
       options.clear_sytem_cache_for_browser_and_profile_on_start = True
     else:
@@ -49,6 +50,7 @@ class Startup(page_test.PageTest):
     pass
 
   def ValidateAndMeasurePage(self, page, tab, results):
+    super(Startup, self).ValidateAndMeasurePage(page, tab, results)
     startup_metric.StartupMetric().AddResults(tab, results)