reland r151588 (remove unsupported run-webkit-tests flags)

Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py

Index: Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py b/Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py
index 52d3e647d3642cdd41159dcb55cadbc7556c213c..24ff966b6615875c1fd24b67566343847bbfa638 100644
--- a/Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py
+++ b/Tools/Scripts/webkitpy/layout_tests/port/port_testcase.py
@@ -472,11 +472,6 @@ class PortTestCase(unittest.TestCase):
                               options=MockOptions(additional_platform_directory=["internal-testwebkitport"]))
         self.assertEqual(platform_dirs(port), ['LayoutTests', 'testwebkitport', 'testwebkitport-version', 'internal-testwebkitport'])
 
-    def test_root_option(self):
-        port = TestWebKitPort()
-        port._options = MockOptions(root='/foo')
-        self.assertEqual(port._path_to_driver(), "/foo/content_shell")
-
     def test_test_expectations(self):
         # Check that we read the expectations file
         host = MockSystemHost()