Re-trying moving AudioElement back to dart:html.

sdk/lib/html/scripts/htmlrenamer.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.
 import re
 
 html_interface_renames = {
     'DOMCoreException': 'DOMException',
     'DOMFormData': 'FormData',
     'DOMURL': 'Url',
@@ skipping 343 matching lines @@
     for interface in self._database.Hierarchy(interface):
       html_interface_name = self.RenameInterface(interface)
       member_name = html_interface_name + '.' + member
       if member_name in candidates:
         return member_name
       member_name = html_interface_name + '.' + member_prefix + member
       if member_name in candidates:
         return member_name
 
   def GetLibraryName(self, interface):
+    if 'Conditional' in interface.ext_attrs:
+      if 'WEB_AUDIO' in interface.ext_attrs['Conditional']:
+        return 'web_audio'
+      if 'SVG' in interface.ext_attrs['Conditional']:
+        return 'svg'
+
     return self._GetLibraryName(interface.id)
 
+  # TODO(blois): remove this method when all members are renamed.
   def _GetLibraryName(self, idl_type_name):
     """
     Gets the name of the library this type should live in.
     This is private because this should use interfaces to resolve the library.
     """
     if idl_type_name.startswith('SVG'):
       return 'svg'
-    if 'Audio' in idl_type_name:
-      return 'web_audio'
-
-    if self._database.HasInterface(idl_type_name):
-      interface = self._database.GetInterface(idl_type_name)
-      for parent in self._database.Hierarchy(interface):
-        if parent.id == 'AudioNode':
-          return 'web_audio'
 
     return 'html'
 
 
   def DartifyTypeName(self, type_name):
     """Converts a DOM name to a Dart-friendly class name. """
     library_name = self._GetLibraryName(type_name)
     # Only renaming SVG for now.
     if library_name != 'svg':
       return type_name
@@ skipping 14 matching lines @@
 
     # We're looking for a sequence of letters which start with capital letter
     # then a series of caps and finishes with either the end of the string or
     # a capital letter.
     # The [0-9] check is for names such as 2D or 3D
     # The following test cases should match as:
     #   WebKitCSSFilterValue: WebKit(C)(SS)(F)ilterValue
     #   XPathNSResolver: (X)()(P)ath(N)(S)(R)esolver (no change)
     #   IFrameElement: (I)()(F)rameElement (no change)
     return re.sub(r'([A-Z])([A-Z]{2,})([A-Z]|$)', toLower, name)