Get rid of System classes for backend generators.

lib/html/scripts/dartgenerator.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 generates Dart APIs from the IDL database."""
 
 import emitter
 import idlnode
 import logging
@@ skipping 208 matching lines @@
           super_database.HasInterface(super_name)):
         interface.ext_attrs['synthesizedSuperInterfaceName'] = super_name
 
       interface_name = interface.id
       auxiliary_file = self._auxiliary_files.get(interface_name)
       if auxiliary_file is not None:
         _logger.info('Skipping %s because %s exists' % (
             interface_name, auxiliary_file))
         continue
 
-      if 'Callback' in interface.ext_attrs:
-        handlers = [op for op in interface.operations if op.id == 'handleEvent']
-        info = AnalyzeOperation(interface, handlers)
-        system.ProcessCallback(interface, info)
-      else:
-        _logger.info('Generating %s' % interface.id)
-        system.ProcessInterface(interface)
+      _logger.info('Generating %s' % interface.id)
+      system.ProcessInterface(interface)
 
   def _PreOrderInterfaces(self, interfaces):
     """Returns the interfaces in pre-order, i.e. parents first."""
     seen = set()
     ordered = []
     def visit(interface):
       if interface.id in seen:
         return
       seen.add(interface.id)
       for parent in interface.parents:
@@ skipping 31 matching lines @@
         ast = [('Annotation', [('Id', 'WebKit')]),
                ('InterfaceType', ('ScopedName', 'EventTarget'))]
         interface.parents.append(idlnode.IDLParentInterface(ast))
 
   def AddMissingArguments(self, database):
     ARG = idlnode.IDLArgument([('Type', ('ScopedName', 'Object')), ('Id', 'arg')])
     for interface in database.GetInterfaces():
       for operation in interface.operations:
         if operation.ext_attrs.get('CallWith') == 'ScriptArguments|CallStack':
           operation.arguments.append(ARG)