Fix style in tools/auto_bisect.

tools/auto_bisect/PRESUBMIT.py

 # Copyright (c) 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.
 
 """Top-level presubmit script for auto-bisect.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts for
 details on the presubmit API.
 """
 
 import imp
 import subprocess
 import os
 
 # Paths to bisect config files relative to this script.
 CONFIG_FILES = [
     'bisect.cfg',
     os.path.join(os.path.pardir, 'run-perf-test.cfg'),
 ]
 
+
 def CheckChangeOnUpload(input_api, output_api):
   return _CommonChecks(input_api, output_api)
 
 
 def CheckChangeOnCommit(input_api, output_api):
   return _CommonChecks(input_api, output_api)
 
 
 def _CommonChecks(input_api, output_api):
   """Does all presubmit checks for auto-bisect."""
@@ skipping 55 matching lines @@
 
 def _RunPyLint(input_api, output_api):
   """Runs unit tests for auto-bisect."""
   telemetry_path = os.path.join(
       input_api.PresubmitLocalPath(), os.path.pardir, 'telemetry')
   mock_path = os.path.join(
       input_api.PresubmitLocalPath(), os.path.pardir, os.path.pardir,
       'third_party', 'pymock')
   disabled_warnings = [
       'relative-import',
-      ]
+  ]
   tests = input_api.canned_checks.GetPylint(
       input_api, output_api, disabled_warnings=disabled_warnings,
       extra_paths_list=[telemetry_path, mock_path])
   return input_api.RunTests(tests)