Make AudioContext work in iOS 7.

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 json
@@ skipping 74 matching lines @@
 # Custom native specs for the dart2js dom.
 #
 _dart2js_dom_custom_native_specs = monitored.Dict(
       'generator._dart2js_dom_custom_native_specs', {
 
     # Nodes with different tags in different browsers can be listed as multiple
     # tags here provided there is not conflict in usage (e.g. browser X has tag
     # T and no other browser has tag T).
 
     'AnalyserNode': 'AnalyserNode,RealtimeAnalyserNode',
+    'AudioContext': 'AudioContext,webkitAudioContext',
 
     'ChannelMergerNode': 'ChannelMergerNode,AudioChannelMerger',
     'ChannelSplitterNode': 'ChannelSplitterNode,AudioChannelSplitter',
 
     'CSSStyleDeclaration':
         #                    IE                   Firefox
         'CSSStyleDeclaration,MSStyleCSSProperties,CSS2Properties',
 
     'ApplicationCache':
         'ApplicationCache,DOMApplicationCache,OfflineResourceList',
@@ skipping 1143 matching lines @@
     if type_data.clazz == 'BasicTypedList':
       if type_name == 'ArrayBuffer':
         dart_interface_name = 'ByteBuffer'
       else:
         dart_interface_name = self._renamer.RenameInterfaceId(type_name)
       return BasicTypedListIDLTypeInfo(
           type_name, type_data, dart_interface_name, self)
 
     class_name = '%sIDLTypeInfo' % type_data.clazz
     return globals()[class_name](type_name, type_data)