Add rules to exclude files with paths containing /test/, /tool/ and /tools/.

PRESUBMIT.py

 # Copyright (c) 2011 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 Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
 
@@ skipping 33 matching lines @@
   that ignores header files and may have some false positives. A
   better implementation would probably need a proper C++ parser.
   """
   # We only scan .cc files and the like, as the declaration of
   # for-testing functions in header files are hard to distinguish from
   # calls to such functions without a proper C++ parser.
   source_extensions = r'\.(cc|cpp|cxx|mm)$'
   file_inclusion_pattern = r'.+%s' % source_extensions
   file_exclusion_pattern = (r'.+(_test_support|_(unit|browser|ui|perf)test)%s' %
                             source_extensions)
+  path_exclusion_pattern = r'.*[/\\](test|tool(s)?)[/\\].*'
 
   base_function_pattern = r'ForTest(ing)?|for_test(ing)?'
   inclusion_pattern = input_api.re.compile(r'(%s)\s*\(' % base_function_pattern)
   exclusion_pattern = input_api.re.compile(
     r'::[A-Za-z0-9_]+(%s)|(%s)[^;]+\{' % (
       base_function_pattern, base_function_pattern))
 
   def FilterFile(affected_file):
-    black_list = ((file_exclusion_pattern, ) + _EXCLUDED_PATHS +
-                  input_api.DEFAULT_BLACK_LIST)
+    black_list = ((file_exclusion_pattern, path_exclusion_pattern, ) +
+                  _EXCLUDED_PATHS + input_api.DEFAULT_BLACK_LIST)
     return input_api.FilterSourceFile(
       affected_file,
       white_list=(file_inclusion_pattern, ),
       black_list=black_list)
 
   problems = []
   for f in input_api.AffectedSourceFiles(FilterFile):
     local_path = f.LocalPath()
     lines = input_api.ReadFile(f).splitlines()
     line_number = 0
@@ skipping 124 matching lines @@
   results.extend(input_api.canned_checks.CheckChangeHasBugField(
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasTestField(
       input_api, output_api))
   results.extend(_CheckSubversionConfig(input_api, output_api))
   return results
 
 
 def GetPreferredTrySlaves():
   return ['win', 'linux', 'mac']