IDL: Drop [PerContextEnabled] extended attribute

Source/bindings/scripts/v8_utilities.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 356 matching lines @@
         return lambda suffix: extended_attributes['MeasureAs']
     if 'Measure' in extended_attributes:
         includes.add('core/frame/UseCounter.h')
         measure_as_name = capitalize(definition_or_member.name)
         if interface is not None:
             measure_as_name = '%s_%s' % (capitalize(interface.name), measure_as_name)
         return lambda suffix: 'V8%s_%s' % (measure_as_name, suffix)
     return None
 
 
-# [PerContextEnabled]
-def per_context_enabled_function_name(definition_or_member):
-    extended_attributes = definition_or_member.extended_attributes
-    if 'PerContextEnabled' not in extended_attributes:
-        return None
-    feature_name = extended_attributes['PerContextEnabled']
-    return 'ContextFeatures::%sEnabled' % uncapitalize(feature_name)
-
-
 # [RuntimeEnabled]
 def runtime_enabled_function_name(definition_or_member):
     """Returns the name of the RuntimeEnabledFeatures function.
 
     The returned function checks if a method/attribute is enabled.
     Given extended attribute RuntimeEnabled=FeatureName, return:
         RuntimeEnabledFeatures::{featureName}Enabled
     """
     extended_attributes = definition_or_member.extended_attributes
     if 'RuntimeEnabled' not in extended_attributes:
@@ skipping 112 matching lines @@
     except StopIteration:
         return None
 
 
 IdlInterface.indexed_property_getter = property(indexed_property_getter)
 IdlInterface.indexed_property_setter = property(indexed_property_setter)
 IdlInterface.indexed_property_deleter = property(indexed_property_deleter)
 IdlInterface.named_property_getter = property(named_property_getter)
 IdlInterface.named_property_setter = property(named_property_setter)
 IdlInterface.named_property_deleter = property(named_property_deleter)