Support JS$ prefix for dart and fix bug where _operator_getter and the [] operator were used incons…

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 logging
@@ skipping 596 matching lines @@
     if interface_name == 'ClientRect' or interface_name == 'DomRectReadOnly':
         js_interop_equivalence_op = ''
 
     js_interop_wrapper = '''
 
   @Deprecated("Internal Use Only")
   static {0} internalCreate{0}() {{
     return new {0}._internalWrap();
   }}
 
-  factory {0}._internalWrap() {{
-    return new {0}.internal_();
-  }}
+  external factory {0}._internalWrap();
 
   @Deprecated("Internal Use Only")
   {0}.internal_() : super.internal_();
 
 '''.format(class_name)
     if base_class == 'NativeFieldWrapperClass2' or base_class == 'DartHtmlDomObject':
         js_interop_wrapper = '''
   @Deprecated("Internal Use Only")
   static {0} internalCreate{0}() {{
     return new {0}._internalWrap();
@@ skipping 708 matching lines @@
 
   def AddFile(self, basename, library_name, path):
     self._libraries[library_name].AddFile(path)
 
   def AddTypeEntry(self, library_name, idl_name, dart_name):
     self._libraries[library_name].AddTypeEntry(idl_name, dart_name)
 
   def Emit(self, emitter, auxiliary_dir):
     for lib in self._libraries.values():
       lib.Emit(emitter, auxiliary_dir)