Change return type to w3c standard of void for AudioBufferCallback.

lib/html/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 198 matching lines @@
   def Generate(self):
     if 'Callback' in self._interface.ext_attrs:
       self.GenerateCallback()
     else:
       self.GenerateInterface()
 
   def GenerateCallback(self):
     """Generates a typedef for the callback interface."""
     handlers = [operation for operation in self._interface.operations
                 if operation.id == 'handleEvent']
     info = AnalyzeOperation(self._interface, handlers)

[Anton Muhin, 2012/10/18 09:59:16]

nit: you can move this line below and maybe even merge into
self._backend.GenerateCallback

     code = self._library_emitter.FileEmitter(self._interface.id)
     code.Emit(self._template_loader.Load('callback.darttemplate'))
-    code.Emit('typedef $TYPE $NAME($PARAMS);\n',
+    code.Emit('typedef void $NAME($PARAMS);\n',
               NAME=self._interface.id,
-              TYPE=self._DartType(info.type_name),
               PARAMS=info.ParametersDeclaration(self._DartType))
     self._backend.GenerateCallback(info)
 
   def GenerateInterface(self):
     interface_name = self._interface_type_info.interface_name()
 
     if (self._interface_type_info.has_generated_interface() and
         not self._interface_type_info.merged_into()):
       interface_emitter = self._library_emitter.FileEmitter(interface_name)
     else:
@@ skipping 877 matching lines @@
 
     library_emitter = self._multiemitter.FileEmitter(library_file_path)
     library_file_dir = os.path.dirname(library_file_path)
     auxiliary_dir = os.path.relpath(auxiliary_dir, library_file_dir)
     imports_emitter = library_emitter.Emit(
         self._template, AUXILIARY_DIR=massage_path(auxiliary_dir))
     for path in sorted(self._path_to_emitter.keys()):
       relpath = os.path.relpath(path, library_file_dir)
       imports_emitter.Emit(
           "#source('$PATH');\n", PATH=massage_path(relpath))