Remove support for attribute event listeners.

client/dom/scripts/dartgenerator.py

 #!/usr/bin/python
 # Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 """This module generates Dart APIs from the IDL database."""
 
 import emitter
 import idlnode
 import logging
@@ skipping 441 matching lines @@
                   frog_interface_generator]
 
     for generator in generators:
       generator.StartInterface()
 
     for const in sorted(interface.constants, ConstantOutputOrder):
       for generator in generators:
         generator.AddConstant(const)
 
     for attr in sorted(interface.attributes, AttributeOutputOrder):
+      if attr.type.id == 'EventListener': continue
       if attr.is_fc_getter:
         for generator in generators:
           generator.AddGetter(attr)
       elif attr.is_fc_setter:
         for generator in generators:
           generator.AddSetter(attr)
 
     # The implementation should define an indexer if the interface directly
     # extends List.
     for parent in interface.parents:
@@ skipping 1540 matching lines @@
     Arguments:
       info: An OperationInfo object.
     """
     # TODO(vsm): Handle overloads.
     self._members_emitter.Emit(
         '\n'
         '  $TYPE $NAME($ARGS) native;\n',
         TYPE=info.type_name,
         NAME=info.name,
         ARGS=info.arg_implementation_declaration)