Generate EventListener attributes of non-EventTarget classes.

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 715 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.type.id == 'EventListener':
+        # Remove EventListener attributes when addEventListener is available.
+        if 'EventTarget' in self._AllImplementedInterfaces(interface):
+          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.
     element_type = MaybeListElementType(interface)
@@ skipping 375 matching lines @@
     for interface in self._database.GetInterfaces():
       seen = set()
       collected = []
       Collect(interface, seen, collected)
       self._inheritance_closure[interface.id] = collected
 
   def _AllImplementedInterfaces(self, interface):
     """Returns a list of the names of all interfaces implemented by 'interface'.
     List includes the name of 'interface'.
     """
+    if not self._inheritance_closure:
+      self._ComputeInheritanceClosure()
     return self._inheritance_closure[interface.id]
 
   def _GenerateProtoMap(self):
     """Determine which DOM type prototypes can be obtained
     from window properties.
     """
     window = None
     for interface in self._database.GetInterfaces():
       if interface.id == 'DOMWindow':
         window = interface
@@ skipping 1351 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)