Do not reduce the number of layout_test workers in *SAN builds.

Tools/Scripts/webkitpy/layout_tests/port/port_testcase.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 127 matching lines @@
         # Test that we set a finite batch size for sanitizer builds.
         port._options.enable_sanitizer = True
         sanitized_batch_size = port.default_batch_size()
         self.assertIsNotNone(sanitized_batch_size)
 
     def test_default_child_processes(self):
         port = self.make_port()
         num_workers = port.default_child_processes()
         self.assertGreaterEqual(num_workers, 1)
 
-        # Test that we reduce the number of workers for sanitizer builds.
-        port._options.enable_sanitizer = True
-        port.host.executive.cpu_count = lambda: 8
-        num_sanitized_workers = port.default_child_processes()
-        self.assertLess(num_sanitized_workers, 8)
-
     def test_default_max_locked_shards(self):
         port = self.make_port()
         port.default_child_processes = lambda: 16
         self.assertEqual(port.default_max_locked_shards(), 4)
         port.default_child_processes = lambda: 2
         self.assertEqual(port.default_max_locked_shards(), 1)
 
     def test_default_timeout_ms(self):
         self.assertEqual(self.make_port(options=MockOptions(configuration='Release')).default_timeout_ms(), 6000)
         self.assertEqual(self.make_port(options=MockOptions(configuration='Debug')).default_timeout_ms(), 18000)
@@ skipping 321 matching lines @@
     def test_additional_platform_directory(self):
         port = self.make_port(options=MockOptions(additional_platform_directory=['/tmp/foo']))
         self.assertEqual(port.baseline_search_path()[0], '/tmp/foo')
 
     def test_virtual_test_suites(self):
         # We test that we can load the real LayoutTests/VirtualTestSuites file properly, so we
         # use a real SystemHost(). We don't care what virtual_test_suites() returns as long
         # as it is iterable.
         port = self.make_port(host=SystemHost(), port_name=self.full_port_name)
         self.assertTrue(isinstance(port.virtual_test_suites(), collections.Iterable))