Ignore pylint blacklist on Windows too

PRESUBMIT.py

 # Copyright (c) 2012 Google Inc. 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 GYP.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into gcl.
 """
@@ skipping 79 matching lines @@
       'year': years_re,
   }
 
   report.extend(input_api.canned_checks.PanProjectChecks(
       input_api, output_api, license_header=license))
   report.extend(input_api.canned_checks.CheckTreeIsOpen(
       input_api, output_api,
       'http://gyp-status.appspot.com/status',
       'http://gyp-status.appspot.com/current'))
 
+  import os
   import sys
   old_sys_path = sys.path
   try:
     sys.path = ['pylib', 'test/lib'] + sys.path
+    blacklist = PYLINT_BLACKLIST
+    if sys.platform == 'win32':
+      blacklist = [os.path.normpath(x).replace('\\', '\\\\')
+                   for x in PYLINT_BLACKLIST]
     report.extend(input_api.canned_checks.RunPylint(
         input_api,
         output_api,
-        black_list=PYLINT_BLACKLIST,
+        black_list=blacklist,
         disabled_warnings=PYLINT_DISABLED_WARNINGS))
   finally:
     sys.path = old_sys_path
   return report
 
 
 def GetPreferredTrySlaves():
   return ['gyp-win32', 'gyp-win64', 'gyp-linux', 'gyp-mac', 'gyp-android']