Revert r12819 to look at IE fix offline.

lib/html/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
 import systembase
 from generator import *
 
-_dart_custom_members = set([
-    'Window.webkitCancelAnimationFrame',
-    'Window.webkitRequestAnimationFrame',
-    ])
 
 class NativeImplementationSystem(systembase.System):
 
   def __init__(self, options):
     super(NativeImplementationSystem, self).__init__(options)
     self._cpp_header_files = []
     self._cpp_impl_files = []
 
   def ImplementationGenerator(self, interface):
     return NativeImplementationGenerator(self, interface)
@@ skipping 511 matching lines @@
         'Callback', True)
 
   def _HasNativeIndexSetter(self):
     return 'CustomIndexedSetter' in self._interface.ext_attrs
 
   def _EmitNativeIndexSetter(self, element_type):
     dart_declaration = 'void operator[]=(int index, %s value)' % element_type
     self._GenerateNativeBinding('numericIndexSetter', 3, dart_declaration,
         'Callback', True)
 
-  def _HasCustomImplementation(self, member_name):
-    member_name = '%s.%s' % (self._html_interface_name, member_name)
-    return member_name in _dart_custom_members
-
   def AddOperation(self, info, html_name):
     """
     Arguments:
       info: An OperationInfo object.
     """
 
-    if self._HasCustomImplementation(info.name):
-      return
-
     operation = info.operations[0]
 
     if 'CheckSecurityForNode' in operation.ext_attrs:
       # FIXME: exclude from interface as well.
       return
 
     is_custom = 'Custom' in operation.ext_attrs
     has_optional_arguments = any(self._IsArgumentOptionalInWebCore(operation, argument) for argument in operation.arguments)
     needs_dispatcher = not is_custom and (len(info.operations) > 1 or has_optional_arguments)
 
@@ skipping 377 matching lines @@
     parent_interface = _FindInHierarchy(database, parent_interface, test)
     if parent_interface:
       return parent_interface
 
 def _ToWebKitName(name):
   name = name[0].lower() + name[1:]
   name = re.sub(r'^(hTML|uRL|jS|xML|xSLT)', lambda s: s.group(1).lower(),
                 name)
   return re.sub(r'^(create|exclusive)', lambda s: 'is' + s.group(1).capitalize(),
                 name)