Rework static method support.

lib/dom/scripts/systeminterface.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 providesfunctionality for systems to generate
 Dart interfaces from the IDL database."""
 
 import os
 import systembase
@@ skipping 195 matching lines @@
     Arguments:
       operations - contains the overloads, one or more operations with the same
         name.
     """
     self._members_emitter.Emit('\n'
                                '  $TYPE $NAME($PARAMS);\n',
                                TYPE=info.type_name,
                                NAME=info.name,
                                PARAMS=info.ParametersInterfaceDeclaration())
 
+  def AddStaticOperation(self, info):
+    pass
+
   # Interfaces get secondary members directly via the superinterfaces.
   def AddSecondaryAttribute(self, interface, getter, setter):
     pass
 
   def AddSecondaryOperation(self, interface, attr):
     pass