support .xht directly so we do not have to rename files during w3c imports

Tools/Scripts/webkitpy/w3c/test_importer.py

Index: Tools/Scripts/webkitpy/w3c/test_importer.py
diff --git a/Tools/Scripts/webkitpy/w3c/test_importer.py b/Tools/Scripts/webkitpy/w3c/test_importer.py
index 0dbd823818209a6fc618a66a2ce58804b9db50b9..71494b9ff3d42e34f04f9199d1a0138c0895311a 100644
--- a/Tools/Scripts/webkitpy/w3c/test_importer.py
+++ b/Tools/Scripts/webkitpy/w3c/test_importer.py
@@ -65,7 +65,6 @@
       This can also be overridden by a -n or --no-overwrite flag
 
     - All files are converted to work in WebKit:
-         1. .xht extensions are changed to .xhtml to make new-run-webkit-tests happy
          2. Paths to testharness.js files are modified point to Webkit's copy of them in

[ojan, 2013/05/22 00:22:06]

Numbering needs updating.

             LayoutTests/resources, using the correct relative path from the new location
          3. All CSS properties requiring the -webkit-vendor prefix are prefixed - this current
@@ -303,9 +302,6 @@ class TestImporter(object):
 
                 new_filepath = os.path.join(new_path, file_to_copy['dest'])
 
-                # FIXME: we should just support '.xht' directly.
-                new_filepath = new_filepath.replace('.xht', '.xhtml')
-
                 if not(os.path.exists(os.path.dirname(new_filepath))):
                     os.makedirs(os.path.dirname(new_filepath))