Added unit tests for max_frame_delay and frame_lengths

tools/perf/measurements/smoothness_unittest.py

Index: tools/perf/measurements/smoothness_unittest.py
diff --git a/tools/perf/measurements/smoothness_unittest.py b/tools/perf/measurements/smoothness_unittest.py
index fc8a87509b66a7c33718050805a4957d1328584b..9723bb18aa16d70fe0cb2602c24997921d3da1a3 100644
--- a/tools/perf/measurements/smoothness_unittest.py
+++ b/tools/perf/measurements/smoothness_unittest.py
@@ -143,6 +143,14 @@ class SmoothnessUnitTest(page_test_test_case.PageTestTestCase):
     self.assertEquals(1, len(jank_count))
     self.assertGreater(jank_count[0].GetRepresentativeNumber(), -1)
 

[nednguyen, 2014/12/23 15:39:11]

Wouldn't these only work for android?

[sullivan, 2014/12/23 15:42:59]

Yep, they only work for Android. The code review tool helpfully hides the top of
this test:

@decorators.Enabled('android')  # SurfaceFlinger is android-only
  def testSmoothnessSurfaceFlingerMetricsCalculated(self):

+    max_frame_delay = results.FindAllPageSpecificValuesNamed('max_frame_delay')
+    self.assertEquals(1, len(max_frame_delay))
+    self.assertGreater(max_frame_delay[0].GetRepresentativeNumber, 0)
+
+    frame_lengths = results.FindAllPageSpecificValuesNamed('frame_lengths')
+    self.assertEquals(1, len(frame_lengths))
+    self.assertGreater(frame_lengths[0].GetRepresentativeNumber, 0)
+
   @decorators.Disabled('mac', 'chromeos')  # http://crbug.com/403903
   def testSmoothnessForPageWithNoGesture(self):
     ps = self.CreateEmptyPageSet()