Update layout_tests tool in media/tools and PRESUBMIT.py per test_expectations.txt renames.

media/tools/layout_tests/test_expectations.py

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 """A module to analyze test expectations for Webkit layout tests."""
 
 import re
 import urllib2
 
 # Default Webkit SVN location for chromium test expectation file.
 # TODO(imasaki): support multiple test expectations files.
 DEFAULT_TEST_EXPECTATION_LOCATION = (
     'http://svn.webkit.org/repository/webkit/trunk/'
-    'LayoutTests/platform/chromium/test_expectations.txt')
+    'LayoutTests/platform/chromium/TestExpectations')
 
 # The following is from test expectation syntax. The detail can be found in
 # http://www.chromium.org/developers/testing/
 # webkit-layout-tests#TOC-Test-Expectations
 # <decision> ::== [SKIP] [WONTFIX] [SLOW]
 DECISION_NAMES = ['SKIP', 'WONTFIX', 'SLOW']
 # <platform> ::== [GPU] [CPU] [WIN] [LINUX] [MAC]
 PLATFORM_NAMES = ['GPU', 'CPU', 'WIN', 'LINUX', 'MAC']
 # <config> ::== RELEASE | DEBUG
 CONFIG_NAMES = ['RELEASE', 'DEBUG']
@@ skipping 121 matching lines @@
       line = line[0:line.rindex('//')]
     for name in ALL_TE_KEYWORDS:
       if name in line:
         test_expectation_info[name] = True
     test_expectation_info['Comments'] = comment_prefix + inline_comments
     # Store bug informations.
     bugs = re.findall(r'BUG\w+', line)
     if bugs:
       test_expectation_info['Bugs'] = bugs
     return test_expectation_info