Added test that SurfaceFlinger metrics are calculated on android

tools/perf/measurements/smoothness_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 sys
 
 from measurements import smoothness
 from metrics import power
 from telemetry import decorators
 from telemetry.core import exceptions
 from telemetry.core import wpr_modes
@@ skipping 110 matching lines @@
     self.assertEquals(len(percentage_smooth), 1)
     self.assertGreaterEqual(percentage_smooth[0].GetRepresentativeNumber(), 0)
 
     mean_input_event_latency = results.FindAllPageSpecificValuesNamed(
         'mean_input_event_latency')
     if mean_input_event_latency:
       self.assertEquals(len(mean_input_event_latency), 1)
       self.assertGreater(
           mean_input_event_latency[0].GetRepresentativeNumber(), 0)
 
+  @decorators.Enabled('android')  # SurfaceFlinger is android-only
+  def testSmoothnessSurfaceFlingerMetricsCalculated(self):
+    ps = self.CreatePageSetFromFileInUnittestDataDir('scrollable_page.html')
+    measurement = smoothness.Smoothness()
+    results = self.RunMeasurement(measurement, ps, options=self._options)
+    self.assertEquals(0, len(results.failures))
+
+    avg_surface_fps = results.FindAllPageSpecificValuesNamed('avg_surface_fps')
+    self.assertEquals(1, len(avg_surface_fps))
+    self.assertGreater(avg_surface_fps[0].GetRepresentativeNumber, 0)
+
+    jank_count = results.FindAllPageSpecificValuesNamed('jank_count')
+    self.assertEquals(1, len(jank_count))
+    self.assertGreater(jank_count[0].GetRepresentativeNumber(), -1)
+
   @decorators.Disabled('mac', 'chromeos')  # http://crbug.com/403903
   def testSmoothnessForPageWithNoGesture(self):
     ps = self.CreateEmptyPageSet()
     ps.AddUserStory(AnimatedPage(ps))
 
     measurement = smoothness.Smoothness()
     results = self.RunMeasurement(measurement, ps, options=self._options)
     self.assertEquals(0, len(results.failures))
 
     percentage_smooth = results.FindAllPageSpecificValuesNamed(
@@ skipping 32 matching lines @@
         self.fake_power = self._power_metric = FakePowerMetric(platform)
 
     measurement = BuggyMeasurement()
     try:
       self.RunMeasurement(measurement, ps)
     except exceptions.IntentionalException:
       pass
 
     self.assertTrue(measurement.fake_power.start_called)
     self.assertTrue(measurement.fake_power.stop_called)