IDL: Basic dictionary inheritance support

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 285 matching lines @@
 
 
 # [ImplementedAs]
 def cpp_name(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
     if 'ImplementedAs' not in extended_attributes:
         return definition_or_member.name
     return extended_attributes['ImplementedAs']
 
 
+def cpp_name_from_interfaces_info(name, interfaces_info):
+    return interfaces_info.get(name, {}).get('implemented_as') or name
+
+
 def cpp_name_or_partial(interface):
     cpp_class_name = cpp_name(interface)
     if interface.is_partial:
         return ''.join([cpp_class_name, 'Partial'])
     return cpp_class_name
 
 
 # [MeasureAs]
 def measure_as(definition_or_member):
     extended_attributes = definition_or_member.extended_attributes
@@ skipping 18 matching lines @@
 
     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:
         return None
     feature_name = extended_attributes['RuntimeEnabled']
     return 'RuntimeEnabledFeatures::%sEnabled' % uncapitalize(feature_name)