Adding supported checks for HttpRequestProgressEvent.

tools/dom/scripts/generator.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 systems to generate
 Dart APIs from the IDL database."""
 
 import copy
 import re
@@ skipping 773 matching lines @@
   'SpeechRecognitionAlternative': _speech_recognition_annotations,
   'SpeechRecognitionError': _speech_recognition_annotations,
   'SpeechRecognitionEvent': _speech_recognition_annotations,
   'SpeechRecognitionResult': _speech_recognition_annotations,
   'WebSocket': _all_but_ie9_annotations,
   'WorkerContext.indexedDB': _indexed_db_annotations,
   'WorkerContext.webkitRequestFileSystem': _file_system_annotations,
   'WorkerContext.webkitRequestFileSystemSync': _file_system_annotations,
   'WorkerContext.webkitResolveLocalFileSystemSyncURL': _file_system_annotations,
   'WorkerContext.webkitResolveLocalFileSystemURL': _file_system_annotations,
+  'XMLHttpRequestProgressEvent': _webkit_experimental_annotations,
 }
 
 def FindCommonAnnotations(interface_name, member_name=None):
   """ Finds annotations common between dart2js and dartium.
   """
   if member_name:
     key = '%s.%s' % (interface_name, member_name)
   else:
     key = interface_name
 
@@ skipping 583 matching lines @@
                                   self)
 
     if type_data.clazz == 'SVGTearOff':
       dart_interface_name = self._renamer.RenameInterface(
           self._database.GetInterface(type_name))
       return SVGTearOffIDLTypeInfo(
           type_name, type_data, dart_interface_name, self)
 
     class_name = '%sIDLTypeInfo' % type_data.clazz
     return globals()[class_name](type_name, type_data)