[OriginTrials] Support OriginTrialEnabled IDL attribute on constants

third_party/WebKit/Source/bindings/scripts/v8_interface.py

 # Copyright (C) 2013 Google Inc. All rights reserved.
 # coding=utf-8
 #
 # 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 60 matching lines @@
     return [constant for constant in constants if
             not constant['measure_as'] and
             not constant['deprecate_as'] and
             not constant['runtime_enabled_function'] and
             not constant['origin_trial_feature_name']]
 
 
 def filter_has_special_getter(constants):
     return [constant for constant in constants if
             constant['measure_as'] or
-            constant['deprecate_as'] or
-            constant['origin_trial_enabled_function']]
+            constant['deprecate_as']]
 
 
 def filter_runtime_enabled(constants):
     return [constant for constant in constants if
             constant['runtime_enabled_function']]
 
 
+def filter_origin_trial_enabled(constants):
+    return [constant for constant in constants if
+            constant['origin_trial_feature_name']]
+
+
 def constant_filters():
     return {'has_constant_configuration': filter_has_constant_configuration,
             'has_special_getter': filter_has_special_getter,
-            'runtime_enabled_constants': filter_runtime_enabled}
+            'runtime_enabled_constants': filter_runtime_enabled,
+            'origin_trial_enabled_constants': filter_origin_trial_enabled}
+
+
+def origin_trial_feature_names(constants, attributes):
+    """ Returns a list of the names of each origin trial feature used in this interface.
+
+    This list is the union of the sets of names used for constants and attributes.
+    """
+
+    feature_names = set(
+        [constant['origin_trial_feature_name'] for constant in constants if constant['origin_trial_feature_name']] +
+        [attribute['origin_trial_feature_name'] for attribute in attributes if attribute['origin_trial_feature_name']]
+    )
+    return sorted(feature_names)
 
 
 def interface_context(interface):
     includes.clear()
     includes.update(INTERFACE_CPP_INCLUDES)
     header_includes = set(INTERFACE_H_INCLUDES)
 
     if interface.is_partial:
         # A partial interface definition cannot specify that the interface
         # inherits from another interface. Inheritance must be specified on
@@ skipping 475 matching lines @@
         'indexed_property_deleter': property_deleter(interface.indexed_property_deleter),
         'is_override_builtins': 'OverrideBuiltins' in extended_attributes,
         'named_property_getter': property_getter(interface.named_property_getter, ['propertyName']),
         'named_property_setter': property_setter(interface.named_property_setter, interface),
         'named_property_deleter': property_deleter(interface.named_property_deleter),
     })
     context.update({
         'has_named_properties_object': is_global and context['named_property_getter'],
     })
 
+    # Origin Trials
+    context.update({
+        'origin_trial_feature_names': origin_trial_feature_names(context['constants'], context['attributes']),
+    })
     return context
 
 
 # [DeprecateAs], [OriginTrialEnabled], [Reflect], [RuntimeEnabled]
 def constant_context(constant, interface):
     extended_attributes = constant.extended_attributes
 
     return {
         'cpp_class': extended_attributes.get('PartialInterfaceImplementedAs'),
         'deprecate_as': v8_utilities.deprecate_as(constant),  # [DeprecateAs]
@@ skipping 780 matching lines @@
     extended_attributes = deleter.extended_attributes
     is_call_with_script_state = v8_utilities.has_extended_attribute_value(deleter, 'CallWith', 'ScriptState')
     is_ce_reactions = 'CEReactions' in extended_attributes
     return {
         'is_call_with_script_state': is_call_with_script_state,
         'is_ce_reactions': is_ce_reactions,
         'is_custom': 'Custom' in extended_attributes,
         'is_raises_exception': 'RaisesException' in extended_attributes,
         'name': cpp_name(deleter),
     }