Revert of re-land: Use browser compositor rendering stats in smoothness

tools/perf/metrics/smoothness.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.
 
 from metrics import Metric
 from metrics import rendering_stats
 from metrics import statistics
 from telemetry.page import page_measurement
 from telemetry.page.perf_tests_helper import FlattenList
 
 TIMELINE_MARKER = 'Smoothness'
 
 
 class MissingDisplayFrameRateError(page_measurement.MeasurementFailure):
   def __init__(self, name):
     super(MissingDisplayFrameRateError, self).__init__(
         'Missing display frame rate metrics: ' + name)
 
-
 class NotEnoughFramesError(page_measurement.MeasurementFailure):
   def __init__(self):
     super(NotEnoughFramesError, self).__init__(
         'Page output less than two frames')
 
 
 class NoSupportedActionError(page_measurement.MeasurementFailure):
   def __init__(self):
     super(NoSupportedActionError, self).__init__(
         'None of the actions is supported by smoothness measurement')
@@ skipping 99 matching lines @@
     # Are we hitting 60 fps for 95 percent of all frames?
     # We use 19ms as a somewhat looser threshold, instead of 1000.0/60.0.
     percentile_95 = statistics.Percentile(frame_times, 95.0)
     results.Add('mostly_smooth', 'score', 1.0 if percentile_95 < 19.0 else 0.0)
 
     if tab.browser.platform.IsRawDisplayFrameRateSupported():
       for r in tab.browser.platform.GetRawDisplayFrameRateMeasurements():
         if r.value is None:
           raise MissingDisplayFrameRateError(r.name)
         results.Add(r.name, r.unit, r.value)