Dartium Roll 38 roll

bindings/scripts/interface_dependency_resolver.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 64 matching lines @@
         the main IdlInterface, as these are only referenced (their members are
         introspected, but not implemented in this interface).
 
         Inherited extended attributes are also added to the main IdlInterface.
 
         Modifies definitions in place by adding parsed dependencies.
 
         Args:
             definitions: IdlDefinitions object, modified in place
         """
+        if not definitions.interfaces:
+            # This definitions should have a dictionary. Nothing to do for it.
+            return
         target_interface = next(definitions.interfaces.itervalues())
         interface_name = target_interface.name
         interface_info = self.interfaces_info[interface_name]
 
         if 'inherited_extended_attributes' in interface_info:
             target_interface.extended_attributes.update(
                 interface_info['inherited_extended_attributes'])
 
         merge_interface_dependencies(definitions,
                                      target_interface,
@@ skipping 75 matching lines @@
         merged_extended_attributes['PartialInterfaceImplementedAs'] = (
             dependency_interface.extended_attributes.get(
                 'ImplementedAs', dependency_interface_basename))
 
     for attribute in dependency_interface.attributes:
         attribute.extended_attributes.update(merged_extended_attributes)
     for constant in dependency_interface.constants:
         constant.extended_attributes.update(merged_extended_attributes)
     for operation in dependency_interface.operations:
         operation.extended_attributes.update(merged_extended_attributes)