Telemetry: adds CPU frequency stats.

tools/perf/measurements/page_cycler_unittest.py

Index: tools/perf/measurements/page_cycler_unittest.py
diff --git a/tools/perf/measurements/page_cycler_unittest.py b/tools/perf/measurements/page_cycler_unittest.py
index fcbbd532fe720f022bab833c3981c287f23ac968..20607af47035d6a4ee0c7e926d52eb9eaf813c41 100644
--- a/tools/perf/measurements/page_cycler_unittest.py
+++ b/tools/perf/measurements/page_cycler_unittest.py
@@ -67,7 +67,10 @@ class FakeBrowser(object):
         '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):
@@ -200,7 +203,7 @@ class PageCyclerUnitTest(unittest.TestCase):
         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'
@@ -213,5 +216,9 @@ class PageCyclerUnitTest(unittest.TestCase):
                            '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)