Fix auto-bisect presubmit so that it checks config files again.

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 src/tools.
+# Paths to bisect config files relative to this script.
 CONFIG_FILES = [
-    'auto_bisect/config.cfg',
-    'run-perf-test.cfg'
+    '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."""
   results = []
   results.extend(_CheckAllConfigFiles(input_api, output_api))
   results.extend(_RunUnitTests(input_api, output_api))
   results.extend(_RunPyLint(input_api, output_api))
   return results
 
 
 def _CheckAllConfigFiles(input_api, output_api):
   """Checks all bisect config files and returns a list of presubmit results."""
   results = []
-  for f in input_api.AffectedFiles():
-    for config_file in CONFIG_FILES:
-      if f.LocalPath().endswith(config_file):
-        results.extend(_CheckConfigFile(config_file, output_api))
+  script_path = input_api.PresubmitLocalPath()
+  for config_file in CONFIG_FILES:
+    file_path = os.path.join(script_path, config_file)
+    results.extend(_CheckConfigFile(file_path, output_api))
   return results
 
 
 def _CheckConfigFile(file_path, output_api):
   """Checks one bisect config file and returns a list of presubmit results."""
   try:
     config_file = imp.load_source('config', file_path)
   except IOError as e:
     warning = 'Failed to read config file %s: %s' % (file_path, str(e))
     return [output_api.PresubmitError(warning, items=[file_path])]
 
-  if not hasattr(config_file.config):
+  if not hasattr(config_file, 'config'):
     warning = 'Config file has no "config" global variable: %s' % str(e)
     return [output_api.PresubmitError(warning, items=[file_path])]
 
   if type(config_file.config) is not dict:
     warning = 'Config file "config" global variable is not dict: %s' % str(e)
     return [output_api.PresubmitError(warning, items=[file_path])]
 
   for k, v in config_file.config.iteritems():
     if v != '':
       warning = 'Non-empty value in config dict: %s: %s' % (repr(k), repr(v))
@@ skipping 21 matching lines @@
   """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')
   tests = input_api.canned_checks.GetPylint(
       input_api, output_api, extra_paths_list=[telemetry_path, mock_path])
   return input_api.RunTests(tests)