[OriginTrials] Support OriginTrialEnabled IDL attribute on constants

third_party/WebKit/Source/bindings/scripts/v8_attributes.py

 # Copyright (C) 2013 Google Inc. 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 208 matching lines @@
 def filter_runtime_enabled(attributes):
     return [attribute for attribute in attributes if
             attribute['runtime_feature_name'] and
             not attribute['exposed_test']]
 
 
 def attribute_filters():
     return {'has_accessor_configuration': filter_has_accessor_configuration,
             'has_attribute_configuration': filter_has_attribute_configuration,
             'origin_trial_enabled_attributes': filter_origin_trial_enabled,
-            'runtime_enabled_attributes': filter_runtime_enabled,
-            }
+            'runtime_enabled_attributes': filter_runtime_enabled}
 
 
 ################################################################################
 # Getter
 ################################################################################
 
 def getter_context(interface, attribute, context):
     idl_type = attribute.idl_type
     base_idl_type = idl_type.base_type
     extended_attributes = attribute.extended_attributes
@@ skipping 331 matching lines @@
     lambda self: strip_suffix(self.base_type, 'Constructor'))
 
 
 def is_constructor_attribute(attribute):
     # FIXME: replace this with [ConstructorAttribute] extended attribute
     return attribute.idl_type.name.endswith('Constructor')
 
 
 def update_constructor_attribute_context(interface, attribute, context):
     context['needs_constructor_getter_callback'] = context['measure_as'] or context['deprecate_as']