mac: Expose keychain access frequency to Telemetry.

tools/perf/measurements/webrtc.py

Index: tools/perf/measurements/webrtc.py
diff --git a/tools/perf/measurements/webrtc.py b/tools/perf/measurements/webrtc.py
index 5b8680ba3ae1a41ecbaed0a6e05114d473f5a5fa..ad37be04a4da964ceb11305c04ab48ebd789e01e 100644
--- a/tools/perf/measurements/webrtc.py
+++ b/tools/perf/measurements/webrtc.py
@@ -2,14 +2,14 @@
 # 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 cpu
 from metrics import memory
 from metrics import power
 from metrics import webrtc_stats
-from telemetry.page import page_test
 
 
-class WebRTC(page_test.PageTest):
+class WebRTC(PageTestMeasurement):
   """Gathers WebRTC-related metrics on a page set."""
 
   def __init__(self):
@@ -34,6 +34,7 @@ class WebRTC(page_test.PageTest):
     self._webrtc_stats_metric.Start(page, tab)
 
   def CustomizeBrowserOptions(self, options):
+    super(WebRTC, self).CustomizeBrowserOptions(options)
     memory.MemoryMetric.CustomizeBrowserOptions(options)
     options.AppendExtraBrowserArgs('--use-fake-device-for-media-stream')
     options.AppendExtraBrowserArgs('--use-fake-ui-for-media-stream')
@@ -41,6 +42,8 @@ class WebRTC(page_test.PageTest):
 
   def ValidateAndMeasurePage(self, page, tab, results):
     """Measure the page's performance."""
+    super(WebRTC, self).ValidateAndMeasurePage(page, tab, results)
+
     self._memory_metric.Stop(page, tab)
     self._memory_metric.AddResults(tab, results)