Implement runtime feature support for CSS Shorthands

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 22 matching lines @@
 
 import in_generator
 import template_expander
 
 
 class StylePropertyShorthandWriter(in_generator.Writer):
     class_name = 'StylePropertyShorthand'
 
     defaults = {
         'longhands': "",
+        'runtimeEnabledShorthand': None,
     }
 
     def __init__(self, in_files, enabled_conditions):
         super(StylePropertyShorthandWriter, self).__init__(in_files, enabled_conditions)
         self._outputs = {("StylePropertyShorthand.cpp"): self.generate_style_property_shorthand_cpp, ("StylePropertyShorthand.h"): self.generate_style_property_shorthand_h}
 
         self._properties = self.in_file.name_dictionaries
         self._longhand_dictionary = defaultdict(list)
 
         for property in self._properties:
             cc = self._camelcase_property_name(property["name"])
             property["property_id"] = self._create_css_property_name_enum_value(cc)
             cc = cc[0].lower() + cc[1:]
             property["camel_case_name"] = cc
             longhands = property["longhands"].split(';')
             property["camel_case_longhands"] = list()
             for longhand in longhands:
                 longhand = self._camelcase_property_name(longhand)
                 longhand = self._create_css_property_name_enum_value(longhand)
                 property["camel_case_longhands"].append(longhand)
                 self._longhand_dictionary[longhand].append(property)
+            if property["runtimeEnabledShorthand"] is not None:
+                lowerFirstConditional = self._lower_first(property["runtimeEnabledShorthand"])
+                property["runtime_conditional_getter"] = "%sEnabled" % lowerFirstConditional
         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
 
+    def _lower_first(self, string):
+        lowered = string[0].lower() + string[1:]
+        lowered = lowered.replace("cSS", "css")
+        return lowered
+
     @template_expander.use_jinja("StylePropertyShorthand.cpp.tmpl")
     def generate_style_property_shorthand_cpp(self):
         return {
             "properties": self._properties,
             "longhands_dictionary": self._longhand_dictionary,
         }
 
     @template_expander.use_jinja("StylePropertyShorthand.h.tmpl")
     def generate_style_property_shorthand_h(self):
         return {
             "properties": self._properties,
         }
 
 if __name__ == "__main__":
     in_generator.Maker(StylePropertyShorthandWriter).main(sys.argv)