mac: Expose keychain access frequency to Telemetry.

tools/perf/measurements/webrtc.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # 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):
     super(WebRTC, self).__init__('RunPageInteractions')
     self._cpu_metric = None
     self._memory_metric = None
     self._power_metric = None
     self._webrtc_stats_metric = None
 
   def WillStartBrowser(self, platform):
     self._power_metric = power.PowerMetric(platform)
 
   def DidStartBrowser(self, browser):
     self._cpu_metric = cpu.CpuMetric(browser)
     self._memory_metric = memory.MemoryMetric(browser)
     self._webrtc_stats_metric = webrtc_stats.WebRtcStatisticsMetric()
 
   def DidNavigateToPage(self, page, tab):
     self._cpu_metric.Start(page, tab)
     self._memory_metric.Start(page, tab)
     self._power_metric.Start(page, tab)
     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')
     power.PowerMetric.CustomizeBrowserOptions(options)
 
   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)
 
     self._cpu_metric.Stop(page, tab)
     self._cpu_metric.AddResults(tab, results)
 
     self._power_metric.Stop(page, tab)
     self._power_metric.AddResults(tab, results)
 
     self._webrtc_stats_metric.Stop(page, tab)
     self._webrtc_stats_metric.AddResults(tab, results)