Remove EventListener attributes from Dart DOM API.

lib/dom/scripts/systemnative.py

 #!/usr/bin/python
 # Copyright (c) 2012, 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 provides shared functionality for the systems to generate
 native binding from the IDL database."""
 
 import emitter
 import os
@@ skipping 421 matching lines @@
           '        RefPtr<ScriptCallStack> scriptCallStack(DartUtilities::createScriptCallStack());\n'
           '        if (!scriptCallStack->size())\n'
           '            return;\n',
           INDEX=len(node.arguments))
       arguments.extend(['scriptArguments', 'scriptCallStack'])
       return True
 
     return False
 
   def AddAttribute(self, getter, setter):
-    # FIXME: Dartium does not support attribute event listeners. However, JS
-    # implementation falls back to them when addEventListener is not available.
-    # Make sure addEventListener is available in all EventTargets and remove
-    # this check.
-    if (getter or setter).type.id == 'EventListener':
-      return
-
     if 'CheckSecurityForNode' in (getter or setter).ext_attrs:
       # FIXME: exclude from interface as well.
       return
 
     # FIXME: these should go away.
     classes_with_unsupported_custom_getters = [
         'Clipboard', 'Console', 'Coordinates', 'DeviceMotionEvent',
         'DeviceOrientationEvent', 'FileReader', 'JavaScriptCallFrame',
         'HTMLInputElement', 'HTMLOptionsCollection', 'HTMLOutputElement',
         'ScriptProfileNode', 'WebKitAnimation']
@@ skipping 391 matching lines @@
 def _InstanceOfNode(database, interface):
   if interface.id == 'Node':
     return True
   for parent in interface.parents:
     if not database.HasInterface(parent.type.id):
       continue
     parent_interface = database.GetInterface(parent.type.id)
     if _InstanceOfNode(database, parent_interface):
       return True
   return False