webkitpy: Make all regex strings use raw string literals.

third_party/WebKit/Tools/Scripts/webkitpy/common/find_files_unittest.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #    * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #    * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 29 matching lines @@
 
     def normpath(self, path):
         return path.replace('/', '\\')
 
 
 class TestWinNormalize(unittest.TestCase):
 
     def assert_filesystem_normalizes(self, filesystem):
         self.assertEqual(find_files._normalize(filesystem, "c:\\foo",
                                                ['fast/html', 'fast/canvas/*', 'compositing/foo.html']),
-                         ['c:\\foo\\fast\html', 'c:\\foo\\fast\canvas\*', 'c:\\foo\compositing\\foo.html'])
+                         ['c:\\foo\\fast\\html', 'c:\\foo\\fast\\canvas\\*', 'c:\\foo\\compositing\\foo.html'])
 
     def test_mocked_win(self):
         # This tests test_files.normalize, using portable behavior emulating
         # what we think Windows is supposed to do. This test will run on all
         # platforms.
         self.assert_filesystem_normalizes(MockWinFileSystem())
 
     def test_win(self):
         # This tests the actual windows platform, to ensure we get the same
         # results that we get in test_mocked_win().
         if sys.platform != 'win32':
             return
         self.assert_filesystem_normalizes(FileSystem())