mac: Expose keychain access frequency to Telemetry.

tools/perf/benchmarks/kraken.py

Index: tools/perf/benchmarks/kraken.py
diff --git a/tools/perf/benchmarks/kraken.py b/tools/perf/benchmarks/kraken.py
index db118b55697d3f1ebd7b76ad36081cd33c81da64..aefdaf66ffcf904180f1be175c6c007a67e0a2a7 100644
--- a/tools/perf/benchmarks/kraken.py
+++ b/tools/perf/benchmarks/kraken.py
@@ -6,10 +6,10 @@
 
 import os
 
+from measurements import PageTestMeasurement
 from metrics import power
 from telemetry import benchmark
 from telemetry.page import page_set
-from telemetry.page import page_test
 from telemetry.value import list_of_scalar_values
 from telemetry.value import scalar
 
@@ -65,12 +65,13 @@ def _Mean(l):
   return float(sum(l)) / len(l) if len(l) > 0 else 0.0
 
 
-class _KrakenMeasurement(page_test.PageTest):
+class _KrakenMeasurement(PageTestMeasurement):
   def __init__(self):
     super(_KrakenMeasurement, self).__init__()
     self._power_metric = None
 
   def CustomizeBrowserOptions(self, options):
+    super(_KrakenMeasurement, self).CustomizeBrowserOptions(options)
     power.PowerMetric.CustomizeBrowserOptions(options)
 
   def WillStartBrowser(self, platform):
@@ -108,6 +109,7 @@ class _KrakenMeasurement(page_test.PageTest):
         description='Total of the means of the results for each type '
                     'of benchmark in [Mozilla\'s Kraken JavaScript benchmark]'
                     '(http://krakenbenchmark.mozilla.org/)'))
+    super(_KrakenMeasurement, self).ValidateAndMeasurePage(page, tab, results)
 
 
 class Kraken(benchmark.Benchmark):