Move _baseline_name to test_result_writer.py.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py

Index: third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py
diff --git a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py
index f8b89c365f50afa5503cb6d2e75b1a42d93ef6c1..0edf238a9d5fc0f76c0e5274d3fb931490122d66 100644
--- a/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py
+++ b/third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/controllers/test_result_writer_unittest.py
@@ -29,7 +29,9 @@
 import optparse
 import unittest
 
+from webkitpy.common.system.filesystem_mock import MockFileSystem
 from webkitpy.common.system.systemhost_mock import MockSystemHost
+from webkitpy.layout_tests.controllers.test_result_writer import baseline_name
 from webkitpy.layout_tests.controllers.test_result_writer import write_test_result
 from webkitpy.layout_tests.port.driver import DriverOutput
 from webkitpy.layout_tests.port.test import TestPort
@@ -76,3 +78,9 @@ class TestResultWriterTests(unittest.TestCase):
         failure.reference_filename = 'notfound.html'
         written_files = self.run_test(failures=[failure], files={})
         self.assertEqual(written_files, {})
+
+    def test_baseline_name(self):
+        fs = MockFileSystem()
+        self.assertEqual(baseline_name(fs, 'x/y/foo.html', 'txt'), 'x/y/foo-expected.txt')
+        self.assertEqual(baseline_name(fs, 'foo.html', 'txt'), 'foo-expected.txt')
+        self.assertEqual(baseline_name(fs, 'foo', 'txt'), 'foo-expected.txt')