Telemetry: adds CPU frequency stats.

tools/perf/measurements/page_cycler_unittest.py

 # Copyright 2013 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.
 
 import unittest
 
 from telemetry.core import browser_options
 from telemetry.page import page_measurement_results
 from telemetry.page import page_runner
 from telemetry.unittest import simple_mock
@@ skipping 49 matching lines @@
 
   @property
   def cpu_stats(self):
     FakeBrowser._iteration += 1
     return {
         'Browser': {'CpuProcessTime': FakeBrowser._iteration,
                     'TotalTime': FakeBrowser._iteration * 2},
         'Renderer': {'CpuProcessTime': FakeBrowser._iteration,
                     'TotalTime': FakeBrowser._iteration * 3},
         'Gpu': {'CpuProcessTime': FakeBrowser._iteration,
-                 'TotalTime': FakeBrowser._iteration * 4}
+                 'TotalTime': FakeBrowser._iteration * 4},
+        'Global': {'GlobalCpuFrequencyStats':
+            {1000000: FakeBrowser._iteration * 5,
+             2000000: FakeBrowser._iteration * 6}},
     }
   @property
   def platform(self):
     return FakePlatform()
 
 
 class FakePlatform(object):
   def GetOSName(self):
     return 'fake'
   def CanMonitorPower(self):
@@ skipping 112 matching lines @@
 
     for i in range(2):
       for page in pages:
         cycler.WillNavigateToPage(page, tab)
         results.WillMeasurePage(page)
         cycler.MeasurePage(page, tab, results)
 
         values = results.page_specific_values_for_current_page
         results.DidMeasurePage()
 
-        self.assertEqual(4, len(values))
+        self.assertEqual(5, len(values))
 
         self.assertEqual(values[0].page, page)
         chart_name = 'cold_times' if i == 0 else 'warm_times'
         self.assertEqual(values[0].name, '%s.page_load_time' % chart_name)
         self.assertEqual(values[0].units, 'ms')
 
         for value, expected in zip(values[1:], ['gpu', 'renderer', 'browser']):
           self.assertEqual(value.page, page)
           self.assertEqual(value.name,
                            'cpu_utilization.cpu_utilization_%s' % expected)
           self.assertEqual(value.units, '%')
 
+        self.assertEqual(values[4].page, page)
+        self.assertEqual(values[4].name,
+                         'cpu_frequency.average_frequency_mhz')
+        self.assertEqual(values[4].units, 'MHz')
 
         cycler.DidNavigateToPage(page, tab)