gclient: Fix cache_dir functionality

tests/gclient_test.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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 gclient.py.
 
 See gclient_smoketest.py for integration tests.
 """
 
@@ skipping 27 matching lines @@
     self.url = url
 
   def RunCommand(self, command, options, args, file_list):
     self.unit_test.assertEquals('None', command)
     self.unit_test.processed.put(self.url)
 
   def FullUrlForRelativeUrl(self, url):
     return self.url + url
 
   # pylint: disable=R0201
-  def DoesRemoteURLMatch(self):
+  def DoesRemoteURLMatch(self, _):
     return True
 
-  def GetActualRemoteURL(self):
+  def GetActualRemoteURL(self, _):
     return self.url
 
 
 class GclientTest(trial_dir.TestCase):
   def setUp(self):
     super(GclientTest, self).setUp()
     self.processed = Queue.Queue()
     self.previous_dir = os.getcwd()
     os.chdir(self.root_dir)
     # Manual mocks.
@@ skipping 594 matching lines @@
   sys.stdout = gclient_utils.MakeFileAutoFlush(sys.stdout)
   sys.stdout = gclient_utils.MakeFileAnnotated(sys.stdout, include_zero=True)
   sys.stderr = gclient_utils.MakeFileAutoFlush(sys.stderr)
   sys.stderr = gclient_utils.MakeFileAnnotated(sys.stderr, include_zero=True)
   logging.basicConfig(
       level=[logging.ERROR, logging.WARNING, logging.INFO, logging.DEBUG][
         min(sys.argv.count('-v'), 3)],
       format='%(relativeCreated)4d %(levelname)5s %(module)13s('
               '%(lineno)d) %(message)s')
   unittest.main()