Don't put private members in dart:html interfaces.

client/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."""
 
 from systemfrog import *
 from systeminterface import *
@@ skipping 502 matching lines @@
   # generate if it should.
   def GetEventAttributes(self, interface):
     events =  set([attr for attr in interface.attributes
                    if self._generator._IsEventAttribute(interface, attr)])
 
     if events or interface.id in _html_explicit_event_classes:
       return True, events
     else:
       return False, None
 
+  def IsPrivate(self, name):
+    return name.startswith('_')
+
 class HtmlSystem(System):
 
   def __init__(self, templates, database, emitters, output_dir, generator):
     super(HtmlSystem, self).__init__(
         templates, database, emitters, output_dir)
     self._shared = HtmlSystemShared(database, generator)
 
 class HtmlInterfacesSystem(HtmlSystem):
 
   def __init__(self, templates, database, emitters, output_dir, generator):
@@ skipping 126 matching lines @@
       self.AddEventAttributes(events)
     else:
       self._EmitEventGetter(self._shared.GetParentEventsClass(self._interface))
 
   def AddAttribute(self, getter, setter):
     html_getter_name = self._shared.RenameInHtmlLibrary(
       self._interface, getter.id, 'get:')
     html_setter_name = self._shared.RenameInHtmlLibrary(
       self._interface, getter.id, 'set:')
 
-    if not html_getter_name:
+    if not html_getter_name or self._shared.IsPrivate(html_getter_name):
       getter = None
-    if not html_setter_name:
+    if not html_setter_name or self._shared.IsPrivate(html_setter_name):
       setter = None
     if not getter and not setter:
       return
 
     # We don't yet handle inconsistent renames of the getter and setter yet.
     if html_getter_name and html_setter_name:
       assert html_getter_name == html_setter_name
     if (getter and setter and
         DartType(getter.type.id) == DartType(setter.type.id)):
       self._members_emitter.Emit('\n  $TYPE $NAME;\n',
                                  NAME=html_getter_name,
                                  TYPE=DartType(getter.type.id));
       return
     if getter and not setter:
       self._members_emitter.Emit('\n  final $TYPE $NAME;\n',
                                  NAME=html_getter_name,
                                  TYPE=DartType(getter.type.id));
       return
     raise Exception('Unexpected getter/setter combination %s %s' %
                     (getter, setter))
 
   def AddOperation(self, info):
     """
     Arguments:
       operations - contains the overloads, one or more operations with the same
         name.
     """
     html_name = self._shared.RenameInHtmlLibrary(self._interface, info.name)
-    if html_name:
+    if html_name and not self._shared.IsPrivate(html_name):
       self._members_emitter.Emit('\n'
                                  '  $TYPE $NAME($PARAMS);\n',
                                  TYPE=info.type_name,         
                                  NAME=html_name,
                                  PARAMS=info.ParametersInterfaceDeclaration())
 
   def FinishInterface(self):
     pass
 
   def AddConstant(self, constant):
@@ skipping 1056 matching lines @@
     # dispatch has removed f(X), leaving only f(Y), but there is no guarantee
     # that Y = Z-X, so we need to check for Y.
     true_code = emitter.Emit(
         '$(INDENT)if ($COND) {\n'
         '$!TRUE'
         '$(INDENT)}\n',
         COND=test, INDENT=indent)
     self.GenerateDispatch(
         true_code, info, indent + '  ', position + 1, positive)
     return True