Remove unnecessary renames from dartdomgenerator.py.

lib/dom/scripts/databasebuilder.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.
 
 import copy
 import database
 import idlparser
 import logging
 import os
@@ skipping 388 matching lines @@
     return changed
 
   def _merge_impl_stmt(self, impl_stmt, import_options):
     """Applies "X implements Y" statemetns on the proper places in the
     database"""
     implementor_name = impl_stmt.implementor.id
     implemented_name = impl_stmt.implemented.id
     _logger.info('merging impl stmt %s implements %s' %
                  (implementor_name, implemented_name))
 
-    if implementor_name == implemented_name:
-      # After renaming, this might happen (e.g. Window impls
-      # AbstractView, but AbstractView was renamed to Window).
-      return
-
     source = import_options.source
     if self._database.HasInterface(implementor_name):
       interface = self._database.GetInterface(implementor_name)
       if interface.parents is None:
         interface.parents = []
       for parent in interface.parents:
         if parent.type.id == implemented_name:
           if source and source not in parent.annotations:
             parent.annotations[source] = IDLAnnotation(
                 import_options.source_attributes)
@@ skipping 158 matching lines @@
             annotation = idl_node.annotations[source]
             for name, value in annotation.items():
               if (name in top_level_annotation
                   and value == top_level_annotation[name]):
                 del annotation[name]
 
         map(normalize, interface.parents)
         map(normalize, interface.constants)
         map(normalize, interface.attributes)
         map(normalize, interface.operations)