[Telemetry + tools/perf] Modify the pylint disable message to use symbolic name

tools/perf/metrics/speedindex.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 telemetry.util import image_util
 from telemetry.util import rgba_color
 from telemetry.value import scalar
 
 from metrics import Metric
 
@@ skipping 31 matching lines @@
 
   def Stop(self, _, tab):
     """Stop recording."""
     if not tab.video_capture_supported:
       return
     assert self._impl, 'Must call Start() before Stop()'
     assert self.IsFinished(tab), 'Must wait for IsFinished() before Stop()'
     self._impl.Stop(tab)
 
   # Optional argument chart_name is not in base class Metric.
-  # pylint: disable=W0221
+  # pylint: disable=arguments-differ
   def AddResults(self, tab, results, chart_name=None):
     """Calculate the speed index and add it to the results."""
     try:
       if tab.video_capture_supported:
         index = self._impl.CalculateSpeedIndex(tab)
         none_value_reason = None
       else:
         index = None
         none_value_reason = 'Video capture is not supported.'
     finally:
@@ skipping 116 matching lines @@
         else:
           return 0.0
       return 1 - histogram.Distance(final_histogram) / total_distance
 
     self._time_completeness_list = [(time, FrameProgress(hist))
                                     for time, hist in histograms]
 
   def GetTimeCompletenessList(self, tab):
     assert self._time_completeness_list, 'Must call Stop() first.'
     return self._time_completeness_list