webkitpy: Avoid to use webkit_base() and literal 'LayoutTests' in BaselineOptimizer

third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/baseline_optimizer_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.checkout.baseline_optimizer import BaselineOptimizer
 from webkitpy.common.host_mock import MockHost
 from webkitpy.common.webkit_finder import WebKitFinder
 
 
 class BaselineOptimizerTest(unittest.TestCase):
 
     def _assert_optimization(self, results_by_directory, directory_to_new_results, baseline_dirname='', host=None):
         host = host or MockHost()
         fs = host.filesystem
-        webkit_base = WebKitFinder(fs).webkit_base()
+        layout_tests_dir = WebKitFinder(fs).layout_tests_dir()
         baseline_name = 'mock-baseline-expected.txt'
         fs.write_text_file(
-            fs.join(webkit_base, 'LayoutTests', 'VirtualTestSuites'),
+            fs.join(layout_tests_dir, 'VirtualTestSuites'),
             '[{"prefix": "gpu", "base": "fast/canvas", "args": ["--foo"]}]')
 
         for dirname, contents in results_by_directory.items():
-            fs.write_binary_file(fs.join(webkit_base, 'LayoutTests', dirname, baseline_name), contents)
+            fs.write_binary_file(fs.join(layout_tests_dir, dirname, baseline_name), contents)
 
         baseline_optimizer = BaselineOptimizer(host, host.port_factory.get(), host.port_factory.all_port_names())
         self.assertTrue(baseline_optimizer.optimize(fs.join(baseline_dirname, baseline_name)))
 
         for dirname, contents in directory_to_new_results.items():
-            path = fs.join(webkit_base, 'LayoutTests', dirname, baseline_name)
+            path = fs.join(layout_tests_dir, dirname, baseline_name)
             if contents is not None:
                 self.assertEqual(fs.read_binary_file(path), contents)
 
     def test_linux_redundant_with_win(self):
         self._assert_optimization(
             {
                 'platform/win': '1',
                 'platform/linux': '1',
             },
             {
@@ skipping 177 matching lines @@
                 '/mock-checkout/third_party/WebKit/LayoutTests': 'bbb',
             },
             {
                 '/mock-checkout/third_party/WebKit/LayoutTests/platform/linux': 'bbb',
                 '/mock-checkout/third_party/WebKit/LayoutTests': 'aaa',
             })
         self.assertEqual(
             host.filesystem.read_binary_file(
                 '/mock-checkout/third_party/WebKit/LayoutTests/another/test-expected.txt'),
             'result A')