Updating DOM code to use list mixins

tools/dom/scripts/systemhtml.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 system to generate
 Dart:html APIs from the IDL database."""
 
 import emitter
 import monitored
@@ skipping 502 matching lines @@
         implements.append(parent_type_info.interface_name())
 
     secure_base_name = self._backend.SecureBaseName(interface_name)
     if secure_base_name:
       implements.append(secure_base_name)
 
     implements_str = ''
     if implements:
       implements_str = ' implements ' + ', '.join(set(implements))
 
+    mixins = self._backend.Mixins()
+    mixins_str = ''
+    if mixins:
+      mixins_str = ' with ' + ', '.join(mixins)
+      if not base_class:
+        base_class = 'Object'
+
     annotations = self._metadata.GetFormattedMetadata(
         self._library_name, self._interface.doc_js_name, '')
 
     class_modifiers = ''
     if self._renamer.ShouldSuppressInterface(self._interface):
       class_modifiers = 'abstract '
 
     self._implementation_members_emitter = implementation_emitter.Emit(
         self._backend.ImplementationTemplate(),
         LIBRARYNAME='dart.dom.%s' % self._library_name,
         ANNOTATIONS=annotations,
         CLASS_MODIFIERS=class_modifiers,
         CLASSNAME=self._interface_type_info.implementation_name(),
         EXTENDS=' extends %s' % base_class if base_class else '',
         IMPLEMENTS=implements_str,
+        MIXINS=mixins_str,
         DOMNAME=self._interface.doc_js_name,
         NATIVESPEC=self._backend.NativeSpec())
     self._backend.StartInterface(self._implementation_members_emitter)
 
     self._backend.EmitHelpers(base_class)
     self._event_generator.EmitStreamProviders(
         self._interface,
         self._backend.CustomJSMembers(),
         self._implementation_members_emitter,
         self._library_name)
@@ skipping 609 matching lines @@
     for library_name in libraries:
       self._libraries[library_name] = DartLibrary(
           library_name, template_loader, library_type, output_dir)
 
   def AddFile(self, basename, library_name, path):
     self._libraries[library_name].AddFile(path)
 
   def Emit(self, emitter, auxiliary_dir):
     for lib in self._libraries.values():
       lib.Emit(emitter, auxiliary_dir)