Stop generating MutationCallback right way.

tools/dom/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
@@ skipping 22 matching lines @@
 
   def CustomJSMembers(self):
     return {}
 
   def GenerateCallback(self, info):
     if IsPureInterface(self._interface.id):
       return
 
     cpp_impl_includes = set()
     cpp_header_handlers_emitter = emitter.Emitter()
-    # TODO(antonm): FIX IT
-    if self._interface.id == 'MutationCallback':
-      cpp_header_handlers_emitter.Emit(
-          '\n'
-          '    virtual ScriptExecutionContext* scriptExecutionContext() const;\n')
     cpp_impl_handlers_emitter = emitter.Emitter()
     class_name = 'Dart%s' % self._interface.id
     for operation in self._interface.operations:
       parameters = []
       arguments = []
       conversion_includes = []
       for argument in operation.arguments:
         argument_type_info = self._TypeInfo(argument.type.id)
         parameters.append('%s %s' % (argument_type_info.parameter_type(),
                                      argument.id))
@@ skipping 818 matching lines @@
         LIBRARY_NAME=library_name)
 
       headers = self._library_headers[library_name]
       for header_file in headers:
         path = os.path.relpath(header_file, output_dir)
         includes_emitter.Emit('#include "$PATH"\n', PATH=path)
         body_emitter.Emit(
             '    if (Dart_NativeFunction func = $CLASS_NAME::resolver(name, argumentCount))\n'
             '        return func;\n',
             CLASS_NAME=os.path.splitext(os.path.basename(path))[0])