W3C test_converter.py fails to prefix if previous declaration does not have ";"

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 77 matching lines @@
             'text-combine-upright': '-webkit-text-combine'
         }
         self.renamed_values = {
             'text-combine-upright': {'all': 'horizontal'}
         }
 
         prop_regex = '([\s{]|^)(' + "|".join(itertools.chain(
             self.renamed_properties.iterkeys(),
             self.renamed_values.iterkeys(),
             self.prefixed_values.iterkeys(),
-            (prop.replace('-webkit-', '') for prop in self.prefixed_properties))) + ')(\s+:|:[^;]*)'
+            (prop.replace('-webkit-', '') for prop in self.prefixed_properties))) + ')(\s*:\s*[-\w]*)'
         self.prop_re = re.compile(prop_regex)
 
     def output(self):
         return (self.converted_properties, ''.join(self.converted_data))
 
     def path_from_webkit_root(self, *comps):
         return self._filesystem.abspath(self._filesystem.join(self._webkit_root, *comps))
 
     def read_webkit_prefixed_css_property_list(self):
         prefixed_properties = []
@@ skipping 145 matching lines @@
         self.converted_data.extend(['&#', name, ';'])
 
     def handle_comment(self, data):
         self.converted_data.extend(['<!-- ', data, ' -->'])
 
     def handle_decl(self, decl):
         self.converted_data.extend(['<!', decl, '>'])
 
     def handle_pi(self, data):
         self.converted_data.extend(['<?', data, '>'])