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

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

Index: Tools/Scripts/webkitpy/layout_tests/port/driver.py
diff --git a/Tools/Scripts/webkitpy/layout_tests/port/driver.py b/Tools/Scripts/webkitpy/layout_tests/port/driver.py
index 4fa44882c8ffdcf87c5f00974f1e12d9ccd2dd6a..6fe5c39ee9fd7a02a97ba9bf5668193d56b862b5 100644
--- a/Tools/Scripts/webkitpy/layout_tests/port/driver.py
+++ b/Tools/Scripts/webkitpy/layout_tests/port/driver.py
@@ -332,12 +332,6 @@ class Driver(object):
     def cmd_line(self, pixel_tests, per_test_args):
         cmd = self._command_wrapper(self._port.get_option('wrapper'))
         cmd.append(self._port._path_to_driver())
-        if self._port.get_option('gc_between_tests'):
-            cmd.append('--gc-between-tests')
-        if self._port.get_option('complex_text'):
-            cmd.append('--complex-text')
-        if self._port.get_option('threaded'):
-            cmd.append('--threaded')
         if self._no_timeout:
             cmd.append('--no-timeout')
         # FIXME: We need to pass --timeout=SECONDS to WebKitTestRunner for WebKit2.