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

tools/telemetry/telemetry/web_perf/timeline_based_measurement_unittest.py

 # Copyright 2014 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 os
 import unittest
 
 from telemetry import story
 from telemetry.internal.results import page_test_results
 from telemetry.page import page as page_module
@@ skipping 89 matching lines @@
       tbm_module._GetRendererThreadsToInteractionRecordsMap(self._model))
     self._story_set = story.StorySet(base_dir=os.path.dirname(__file__))
     self._story_set.AddStory(page_module.Page(
         'http://www.bar.com/', self._story_set, self._story_set.base_dir))
     self._results.WillRunPage(self._story_set.stories[0])
 
   def AddResults(self):
     all_metrics = self._tbm_options.GetTimelineBasedMetrics()
 
     for thread, records in self._threads_to_records_map.iteritems():
-      metric = tbm_module._TimelineBasedMetrics(  # pylint: disable=W0212
+      # pylint: disable=protected-access
+      metric = tbm_module._TimelineBasedMetrics(
           self._model, thread, records, self._results_wrapper, all_metrics)
       metric.AddResults(self._results)
 
     for metric in all_metrics:
       metric.AddWholeTraceResults(self._model, self._results)
 
     self._results.DidRunPage(self._story_set.stories[0])
 
 
 class TimelineBasedMetricsTests(unittest.TestCase):
@@ skipping 79 matching lines @@
 
   def testDuplicateRepeatableInteractions(self):
     d = TimelineBasedMetricTestData(self._options)
     d.AddInteraction(d.renderer_thread, ts=10, duration=5,
                      marker='Interaction.LogicalName/repeatable')
     d.AddInteraction(d.renderer_thread, ts=20, duration=5,
                      marker='Interaction.LogicalName/repeatable')
     d.FinalizeImport()
     d.AddResults()
     self.assertEquals(1, len(d.results.pages_that_succeeded))