Make reftests work for sky.

sky/tools/webkitpy/layout_tests/port/base.py

 # Copyright (C) 2010 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 211 matching lines @@
     def buildbot_archives_baselines(self):
         return True
 
     def additional_drt_flag(self):
         driver_name = self.driver_name()
         if driver_name == self.CONTENT_SHELL_NAME:
             return ['--dump-render-tree']
         if driver_name == self.MOJO_SHELL_NAME:
             return [
                 '--args-for=mojo:native_viewport_service --use-headless-config --use-osmesa',
+                '--args-for=mojo:sky_viewer --testing',
                 '--content-handlers=text/sky,mojo:sky_viewer',
                 '--url-mappings=mojo:window_manager=mojo:sky_tester',
                 'mojo:window_manager',
             ]
         return []
 
     def supports_per_test_timeout(self):
         return False
 
     def default_pixel_tests(self):
@@ skipping 1530 matching lines @@
 
 class PhysicalTestSuite(object):
     def __init__(self, base, args):
         self.name = base
         self.base = base
         self.args = args
         self.tests = set()
 
     def __repr__(self):
         return "PhysicalTestSuite('%s', '%s', %s)" % (self.name, self.base, self.args)