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

tools/perf/metrics/cpu.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 logging
 
 from telemetry.value import scalar
 
 from metrics import Metric
 
@@ skipping 19 matching lines @@
     self._start_cpu = self._browser.cpu_stats
 
   def Stop(self, page, tab):
     if not self._browser.supports_cpu_metrics:
       return
 
     assert self._start_cpu, 'Must call Start() first'
     self._stop_cpu = self._browser.cpu_stats
 
   # Optional argument trace_name is not in base class Metric.
-  # pylint: disable=W0221
+  # pylint: disable=arguments-differ
   def AddResults(self, tab, results, trace_name='cpu_utilization'):
     if not self._browser.supports_cpu_metrics:
       return
 
     assert self._stop_cpu, 'Must call Stop() first'
     cpu_stats = _SubtractCpuStats(self._stop_cpu, self._start_cpu)
 
     # FIXME: Renderer process CPU times are impossible to compare correctly.
     # http://crbug.com/419786#c11
     if 'Renderer' in cpu_stats:
@@ skipping 38 matching lines @@
     # Linux kernel starts with a value close to an overflow, so correction is
     # necessary.
     if total_time < 0:
       total_time += 2**32
     # Assert that the arguments were given in the correct order.
     assert total_time > 0 and total_time < 2**31, (
         'Expected total_time > 0, was: %d' % total_time)
     cpu_usage[process_type] = float(cpu_process_time) / total_time
   return cpu_usage