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diff --git a/Tools/Scripts/webkitpy/layout_tests/test_types/text_diff.py b/Tools/Scripts/webkitpy/layout_tests/test_types/text_diff.py
new file mode 100644
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+++ b/Tools/Scripts/webkitpy/layout_tests/test_types/text_diff.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python
+# 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
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""Compares the text output of a test to the expected text output.
+
+If the output doesn't match, returns FailureTextMismatch and outputs the diff
+files into the layout test results directory.
+"""
+
+from __future__ import with_statement
+
+import codecs
+import errno
+import logging
+import os.path
+
+from webkitpy.layout_tests.layout_package import test_failures
+from webkitpy.layout_tests.test_types import test_type_base
+
+_log = logging.getLogger("webkitpy.layout_tests.test_types.text_diff")
+
+
+class TestTextDiff(test_type_base.TestTypeBase):
+
+    def _get_normalized_output_text(self, output):
+        """Returns the normalized text output, i.e. the output in which
+        the end-of-line characters are normalized to "\n"."""
+        # Running tests on Windows produces "\r\n".  The "\n" part is helpfully
+        # changed to "\r\n" by our system (Python/Cygwin), resulting in
+        # "\r\r\n", when, in fact, we wanted to compare the text output with
+        # the normalized text expectation files.
+        return output.replace("\r\r\n", "\r\n").replace("\r\n", "\n")
+
+    def compare_output(self, port, filename, test_args, actual_test_output,
+                        expected_test_output):
+        """Implementation of CompareOutput that checks the output text against
+        the expected text from the LayoutTest directory."""
+        failures = []
+
+        # If we're generating a new baseline, we pass.
+        if test_args.new_baseline or test_args.reset_results:
+            # Although all test_shell/DumpRenderTree output should be utf-8,
+            # we do not ever decode it inside run-webkit-tests.  For some tests
+            # DumpRenderTree may not output utf-8 text (e.g. webarchives).
+            self._save_baseline_data(filename, actual_test_output.text,
+                                     ".txt", encoding=None,
+                                     generate_new_baseline=test_args.new_baseline)
+            return failures
+
+        # Normalize text to diff
+        actual_text = self._get_normalized_output_text(actual_test_output.text)
+        # Assuming expected_text is already normalized.
+        expected_text = expected_test_output.text
+
+        # Write output files for new tests, too.
+        if port.compare_text(actual_text, expected_text):
+            # Text doesn't match, write output files.
+            self.write_output_files(filename, ".txt", actual_text,
+                                    expected_text, encoding=None,
+                                    print_text_diffs=True)
+
+            if expected_text == '':
+                failures.append(test_failures.FailureMissingResult())
+            else:
+                failures.append(test_failures.FailureTextMismatch())
+
+        return failures