fix virtual_test_suites() for browser_test ports

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

 # Copyright (C) 2011 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 20 matching lines @@
 from webkitpy.common.system import executive_mock
 from webkitpy.common.system.systemhost_mock import MockSystemHost
 from webkitpy.tool.mocktool import MockOptions
 
 from webkitpy.layout_tests.port import linux
 from webkitpy.layout_tests.port import port_testcase
 
 
 class LinuxPortTest(port_testcase.PortTestCase):
     port_name = 'linux'
+    full_port_name = 'linux-x86'
     port_maker = linux.LinuxPort
 
     def assert_architecture(self, port_name=None, file_output=None, expected_architecture=None):
         host = MockSystemHost()
         host.filesystem.isfile = lambda x: 'content_shell' in x
         if file_output:
             host.executive = executive_mock.MockExecutive2(file_output)
 
         port = self.make_port(host, port_name=port_name)
         self.assertEqual(port.architecture(), expected_architecture)
@@ skipping 47 matching lines @@
         # Test that optional relative paths are returned unmodified.
         options = MockOptions(configuration='Release', build_directory='foo')
         self.assert_build_path(options, ['/mock-checkout/out/Release'], 'foo/Release')
 
     def test_driver_name_option(self):
         self.assertTrue(self.make_port()._path_to_driver().endswith('content_shell'))
         self.assertTrue(self.make_port(options=MockOptions(driver_name='OtherDriver'))._path_to_driver().endswith('OtherDriver'))
 
     def test_path_to_image_diff(self):
         self.assertEqual(self.make_port()._path_to_image_diff(), '/mock-checkout/out/Release/image_diff')