Remove protected-access from tools/perf/pylintrc.

tools/perf/measurements/v8_gc_times.py

 # Copyright 2015 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.core.platform import tracing_category_filter
 from telemetry.core.platform import tracing_options
 from telemetry.page import page_test
 from telemetry.timeline.model import TimelineModel
 from telemetry.util import statistics
 from telemetry.value import scalar
@@ skipping 151 matching lines @@
 def _FindV8EventStatForEvent(v8_event_stats_list, event_name):
   for v8_event_stat in v8_event_stats_list:
     if v8_event_stat.src_event_name == event_name:
       return v8_event_stat
   return None
 
 
 def _ParentIdleTask(event):
   parent = event.parent_slice
   while parent:
+    # pylint: disable=protected-access
     if parent.name == V8GCTimes._IDLE_TASK_PARENT:
       return parent
     parent = parent.parent_slice
   return None
 
 
 class V8EventStat(object):
 
   def __init__(self, src_event_name, result_name, result_description):
     self.src_event_name = src_event_name
     self.result_name = result_name
     self.result_description = result_description
     self.thread_duration = 0.0
     self.thread_duration_inside_idle = 0.0
     self.idle_task_overrun_duration = 0.0
 
   @property
   def thread_duration_outside_idle(self):
     return self.thread_duration - self.thread_duration_inside_idle
 
   @property
   def percentage_thread_duration_during_idle(self):
     return statistics.DivideIfPossibleOrZero(
         100 * self.thread_duration_inside_idle, self.thread_duration)