Detect if webkitNotifications is available and remove webkit prefix (replaced

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 os
@@ skipping 27 matching lines @@
     'Console.timeStamp',
     'Console.trace',
     'Console.warn',
     'CSSStyleDeclaration.setProperty',
     'Element.insertAdjacentElement',
     'Element.insertAdjacentHTML',
     'Element.insertAdjacentText',
     'Element.webkitMatchesSelector',
     'Element.remove',
     'ElementEvents.mouseWheel',
+    'DOMException.name',
     'HTMLCanvasElement.getContext',
     'HTMLTableElement.createTBody',
     'IDBDatabase.transaction',
     'KeyboardEvent.initKeyboardEvent',
     'MouseEvent.offsetX',
     'MouseEvent.offsetY',
     'Navigator.language',
     'URL.createObjectURL',
     'URL.revokeObjectURL',
     'WheelEvent.wheelDeltaX',
@@ skipping 22 matching lines @@
   'HTMLKeygenElement': "Element.isTagSupported('keygen') "
       "&& (new Element.tag('keygen') is KeygenElement)",
   'HTMLMarqueeElement': "Element.isTagSupported('marquee')"
       "&& (new Element.tag('marquee') is MarqueeElement)",
   'HTMLMeterElement': "Element.isTagSupported('meter')",
   'HTMLObjectElement': "Element.isTagSupported('object')",
   'HTMLOutputElement': "Element.isTagSupported('output')",
   'HTMLProgressElement': "Element.isTagSupported('progress')",
   'HTMLShadowElement': "Element.isTagSupported('shadow')",
   'HTMLTrackElement': "Element.isTagSupported('track')",
+  'NotificationCenter': "JS('bool', '!!(window.webkitNotifications)')",
   'Performance': "JS('bool', '!!(window.performance)')",
   'WebSocket': "JS('bool', 'typeof window.WebSocket != \"undefined\"')",
 }
 
 # Classes that offer only static methods, and therefore we should suppress
 # constructor creation.
 _static_classes = set(['Url'])
 
 # Information for generating element constructors.
 #
@@ skipping 949 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)