Factor out gcl.GetRepositoryRoot() into scm.SVN.GetCheckoutRoot()

tests/gclient_scm_test.py

 #!/usr/bin/python
 #
 # Copyright 2008-2009 Google Inc.  All Rights Reserved.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
@@ skipping 47 matching lines @@
   def setUp(self):
     BaseTestCase.setUp(self)
     self.root_dir = self.Dir()
     self.args = self.Args()
     self.url = self.Url()
     self.relpath = 'asf'
 
   def testDir(self):
     members = [
         'COMMAND', 'Capture', 'CaptureHeadRevision', 'CaptureInfo',
-        'CaptureStatus', 'DiffItem', 'GetEmail',
+        'CaptureStatus', 'DiffItem', 'GetCheckoutRoot', 'GetEmail',
         'GetFileProperty', 'IsMoved', 'ReadSimpleAuth', 'Run',
         'RunAndFilterOutput', 'RunAndGetFileList',
         'RunCommand', 'cleanup', 'diff', 'export', 'pack', 'relpath', 'revert',
         'revinfo', 'runhooks', 'scm_name', 'status', 'update', 'url',
     ]
 
     # If you add a member, be sure to add the relevant test!
     self.compareMembers(self._scm_wrapper(), members)
 
   def testUnsupportedSCM(self):
@@ skipping 449 matching lines @@
                                 relpath=self.relpath)
     rev_info = scm.revinfo(options, (), None)
     self.assertEquals(rev_info, '069c602044c5388d2d15c3f875b057c852003458')
 
 
 if __name__ == '__main__':
   import unittest
   unittest.main()
 
 # vim: ts=2:sw=2:tw=80:et: