Move patch management functions into their own file, patch.py.

tests/svn_utils_test.py

 #!/usr/bin/python
 # Copyright (c) 2010 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.
 
 """Unit tests for svn_utils.py."""
 
 import logging
 import os
 import shutil
 import sys
 import unittest
 
 ROOT_DIR = os.path.dirname(os.path.abspath(__file__))
 sys.path.append(os.path.join(ROOT_DIR, '..'))
 
-import pending_manager
+import patch
 import svn_utils
 
 PATCH = """\
 --- svn_utils_test.txt
 +++ svn_utils_test.txt
 @@ -3,6 +3,7 @@ bb
  ccc
  dd
  e
 +FOO!
@@ skipping 21 matching lines @@
     if os.path.exists(self.root_dir):
       shutil.rmtree(self.root_dir)
 
   def testModification(self):
     # A bit sad as it relies on the public server.
     url = ('http://src.chromium.org/svn/trunk/tools/commit-queue/tests/'
            'svn_utils_test_data')
     svn_utils.revert(url, self.root_dir, None, None)
     content = read(os.path.join(self.root_dir, 'svn_utils_test.txt'))
     self.assertTrue(os.path.join(self.root_dir, 'svn_utils_test.txt'))
-    svn_utils.apply_patch(
-        self.root_dir, pending_manager.auto_mangle_git_patch(PATCH))
+    patch.apply_patch(
+        self.root_dir, patch.auto_mangle_git_patch(PATCH))
     content_lines = content.splitlines(True)
     content_modified = ''.join(content_lines[0:5] + ['FOO!\n'] +
       content_lines[5:])
     self.assertEquals(content_modified,
       read(os.path.join(self.root_dir, 'svn_utils_test.txt')))
     svn_utils.revert(url, self.root_dir, None, None)
     self.assertEquals(content,
       read(os.path.join(self.root_dir, 'svn_utils_test.txt')))
 
 
 if __name__ == '__main__':
   logging.basicConfig(level=logging.ERROR)
   unittest.main()