Allow non-primitive-value dictionaries to be passed to constructors for html

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 52 matching lines @@
     'Window.document',
     'Window.indexedDB',
     'Window.location',
     'Window.open',
     'Window.requestAnimationFrame',
     'Window.webkitCancelAnimationFrame',
     'Window.webkitRequestAnimationFrame',
     'WorkerContext.indexedDB',
     ])
 
+_js_custom_constructors = set([
+    'AudioContext',
+    'Blob',
+    'MutationObserver',
+    'Notification',
+    'RTCIceCandidate',
+    'RTCPeerConnection',
+    'RTCSessionDescription',
+    'SpeechRecognition',
+    ])
+
 # Classes that offer only static methods, and therefore we should suppress
 # constructor creation.
 _static_classes = set(['Url'])
 
 # Information for generating element constructors.
 #
 # TODO(sra): maybe remove all the argument complexity and use cascades.
 #
 #   var c = new CanvasElement(width: 100, height: 70);
 #   var c = new CanvasElement()..width = 100..height = 70;
@@ skipping 521 matching lines @@
         lib_prefix = ''
         constructors = _html_element_constructors
       return (js_support_checks.get(self._interface.doc_js_name) +
           " && (new %sElement.tag('%s') is %s)" % (lib_prefix,
         constructors[self._interface.doc_js_name],
         self._renamer.RenameInterface(self._interface)))
     return js_support_checks.get(self._interface.doc_js_name)
 
   def GenerateCustomFactory(self, constructor_info):
     # Custom factory will be taken from the template.
-    return self._interface.doc_js_name in [
-        'AudioContext',
-        'Blob',
-        'MutationObserver',
-        'SpeechRecognition',
-    ]
+    return self._interface.doc_js_name in _js_custom_constructors
 
   def IsConstructorArgumentOptional(self, argument):
     return 'Optional' in argument.ext_attrs
 
   def EmitStaticFactoryOverload(self, constructor_info, name, arguments):
     index = len(arguments)
     arguments = constructor_info.ParametersAsArgumentList(index)
     if arguments:
       arguments = ', ' + arguments
     self._members_emitter.Emit(
@@ skipping 477 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)