fix paths in webkitpy tests.

Tools/Scripts/webkitpy/w3c/test_converter.py

 #!/usr/bin/env python
 
 # Copyright (C) 2013 Adobe Systems Incorporated. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 #
 # 1. Redistributions of source code must retain the above
 #    copyright notice, this list of conditions and the following
@@ skipping 13 matching lines @@
 # 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.
 
 import logging
 import re
 
 from webkitpy.common.host import Host
+from webkitpy.common.webkit_finder import WebKitFinder
 from webkitpy.thirdparty.BeautifulSoup import BeautifulSoup, Tag
 
 
 _log = logging.getLogger(__name__)
 
 
 class W3CTestConverter(object):
 
     def __init__(self):
         self._host = Host()
         self._filesystem = self._host.filesystem
-        self._host.initialize_scm()
-        self._webkit_root = self._host.scm().checkout_root
+        self._webkit_root = WebKitFinder(self._filesystem).webkit_base()
 
         # These settings might vary between WebKit and Blink
         self._css_property_file = self.path_from_webkit_root('Source', 'core', 'css', 'CSSPropertyNames.in')
         self._css_property_split_string = 'alias_for='
 
         self.prefixed_properties = self.read_webkit_prefixed_css_property_list()
 
     def path_from_webkit_root(self, *comps):
         return self._filesystem.abspath(self._filesystem.join(self._webkit_root, *comps))
 
@@ skipping 127 matching lines @@
                 converted_properties.append(prefixed_property)
                 text = re.sub(pattern, prefixed_property + ':', text)
 
         # FIXME: Handle the JS versions of these properties and GetComputedStyle, too.
         return (converted_properties, text)
 
     def replace_tag(self, old_tag, new_tag):
         index = old_tag.parent.contents.index(old_tag)
         old_tag.parent.insert(index, new_tag)
         old_tag.extract()