webkitpy: Reduce usage of path_from_webkit_base().

third_party/WebKit/Tools/Scripts/webkitpy/style/checkers/python.py

 # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1.  Redistributions of source code must retain the above copyright
 #     notice, this list of conditions and the following disclaimer.
 # 2.  Redistributions in binary form must reproduce the above copyright
 #     notice, this list of conditions and the following disclaimer in the
 #     documentation and/or other materials provided with the distribution.
@@ skipping 58 matching lines @@
         output = self.run_pylint(self._file_path)
         errors = self._parse_pylint_output(output)
         for line_number, category, message in errors:
             self._handle_style_error(line_number, category, 5, message)
 
     def run_pylint(self, path):
         wkf = WebKitFinder(FileSystem())
         executive = Executive()
         env = os.environ.copy()
         env['PYTHONPATH'] = os.pathsep.join([
-            wkf.path_from_webkit_base('Tools', 'Scripts'),
-            wkf.path_from_webkit_base('Source', 'build', 'scripts'),
-            wkf.path_from_webkit_base('Tools', 'Scripts', 'webkitpy', 'thirdparty'),
-            wkf.path_from_webkit_base('Source', 'bindings', 'scripts'),
+            wkf.path_from_tools_scripts(),
+            wkf.path_from_blink_source('build', 'scripts'),
+            wkf.path_from_tools_scripts('webkitpy', 'thirdparty'),
+            wkf.path_from_blink_source('bindings', 'scripts'),
             wkf.path_from_chromium_base('build', 'android'),
             wkf.path_from_chromium_base('third_party', 'catapult', 'devil'),
             wkf.path_from_chromium_base('third_party', 'pymock'),
         ])
         return executive.run_command([
             sys.executable,
             wkf.path_from_depot_tools_base('pylint.py'),
             '--output-format=parseable',
             '--rcfile=' + wkf.path_from_webkit_base('Tools', 'Scripts', 'webkitpy', 'pylintrc'),
             path,
@@ skipping 24 matching lines @@
 
             line_number = int(match_obj.group(2))
             category_and_method = match_obj.group(3).split(', ')
             category = 'pylint/' + (category_and_method[0])
             if len(category_and_method) > 1:
                 message = '[%s] %s' % (category_and_method[1], match_obj.group(4))
             else:
                 message = match_obj.group(4)
             errors.append((line_number, category, message))
         return errors