Add --reset-to-deps and improve comments

tests/scm_unittest.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 scm.py."""
 
 from shutil import rmtree
 import tempfile
 
@@ skipping 10 matching lines @@
     self.mox.StubOutWithMock(scm.gclient_utils, 'SubprocessCall')
     self.mox.StubOutWithMock(scm.gclient_utils, 'SubprocessCallAndFilter')
 
 
 class RootTestCase(BaseSCMTestCase):
   def testMembersChanged(self):
     self.mox.ReplayAll()
     members = [
         'GetCasedPath', 'GIT', 'SVN', 'ValidateEmail',
         'gclient_utils', 'glob', 'os', 're', 'shutil', 'subprocess', 'sys',
-        'tempfile', 'xml',
+        'tempfile', 'time', 'xml',
     ]
     # If this test fails, you should add the relevant test.
     self.compareMembers(scm, members)
 
 
 class GitWrapperTestCase(SuperMoxBaseTestBase):
   sample_git_import = """blob
 mark :1
 data 6
 Hello
@@ skipping 284 matching lines @@
     self.mox.ReplayAll()
     info = scm.SVN.CaptureStatus(None)
     self.assertEquals(info, [])
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()
 
 # vim: ts=2:sw=2:tw=80:et: