Remove .tmpl extension from Jinja templates in core

Source/core/scripts/make_style_shorthands.py

 #!/usr/bin/env python
 # Copyright (C) 2013 Intel Corporation. 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
@@ skipping 52 matching lines @@
                 self._longhand_dictionary[longhand].append(property)
         self._properties = dict((property["property_id"], property) for property in self._properties)
 
 # FIXME: some of these might be better in a utils file
     def _camelcase_property_name(self, property_name):
         return re.sub(r'(^[^-])|-(.)', lambda match: (match.group(1) or match.group(2)).upper(), property_name)
 
     def _create_css_property_name_enum_value(self, property_name):
         return "CSSProperty" + property_name
 
-    @template_expander.use_jinja("StylePropertyShorthand.cpp.tmpl")
+    @template_expander.use_jinja("StylePropertyShorthand.cpp")
     def generate_style_property_shorthand_cpp(self):
         return {
             "properties": self._properties,
             "longhands_dictionary": self._longhand_dictionary,
         }
 
-    @template_expander.use_jinja("StylePropertyShorthand.h.tmpl")
+    @template_expander.use_jinja("StylePropertyShorthand.h")
     def generate_style_property_shorthand_h(self):
         return {
             "properties": self._properties,
         }
 
 if __name__ == "__main__":
     in_generator.Maker(StylePropertyShorthandWriter).main(sys.argv)