WPT Auto-import: fix for owner list in import CLs.

third_party/WebKit/Tools/Scripts/webkitpy/w3c/test_importer_unittest.py

 # Copyright 2016 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.
 
 import collections
 
 from webkitpy.common.checkout.git_mock import MockGit
 from webkitpy.common.host_mock import MockHost
 from webkitpy.common.system.executive_mock import MockExecutive
 from webkitpy.common.system.log_testing import LoggingTestCase
@@ skipping 155 matching lines @@
     def test_get_directory_owners(self):
         host = MockHost()
         host.filesystem.write_text_file(
             '/mock-checkout/third_party/WebKit/LayoutTests/W3CImportExpectations',
             '## Owners: someone@chromium.org\n'
             '# external/wpt/foo [ Pass ]\n')
         git = MockGit()
         git.changed_files = lambda: ['third_party/WebKit/LayoutTests/external/wpt/foo/x.html']
         host.git = lambda: git
         importer = TestImporter(host)
-        self.assertEqual(importer.get_directory_owners(), {'someone@chromium.org': 'external/wpt/foo'})
+        self.assertEqual(importer.get_directory_owners(), {'someone@chromium.org': ['external/wpt/foo']})
 
     def test_get_directory_owners_no_changed_files(self):
         host = MockHost()
         host.filesystem.write_text_file(
             '/mock-checkout/third_party/WebKit/LayoutTests/W3CImportExpectations',
             '## Owners: someone@chromium.org\n'
             '# external/wpt/foo [ Pass ]\n')
         importer = TestImporter(host)
         self.assertEqual(importer.get_directory_owners(), {})