Do not split attributes on getters and setters in databasebuilder.

lib/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
 
@@ skipping 924 matching lines @@
     for merged_interface in _merged_html_interfaces:
       if _merged_html_interfaces[merged_interface] == self._interface.id:
         merged_interface = self._database.GetInterface(merged_interface)
         self.AddMembers(merged_interface)
         self._backend.AddMergedMembers(merged_interface)
 
     self._backend.AddMembers(self._interface)
     self._backend.AddSecondaryMembers(self._interface)
     self._backend.FinishInterface()
 
-  def AddAttribute(self, getter, setter):
+  def AddAttribute(self, attribute):
+    getter = attribute
+    setter = attribute if not IsReadOnly(attribute) else None
     dom_name = DartDomNameOfAttribute(getter)
     html_getter_name = self._shared.RenameInHtmlLibrary(
       self._interface.id, dom_name, 'get:')
     html_setter_name = self._shared.RenameInHtmlLibrary(
       self._interface.id, dom_name, 'set:')
 
     if not html_getter_name or self._shared.IsPrivate(html_getter_name):
       getter = None
     if not html_setter_name or self._shared.IsPrivate(html_setter_name):
       setter = None
@@ skipping 262 matching lines @@
             '  }\n',
             TYPE=self._NarrowInputType(element_type))
 
     # TODO(sra): Use separate mixins for mutable implementations of List<T>.
     # TODO(sra): Use separate mixins for typed array implementations of List<T>.
     if self._interface.id != 'NodeList':
       template_file = 'immutable_list_mixin.darttemplate'
       template = self._system._templates.Load(template_file)
       self._members_emitter.Emit(template, E=self._shared.DartType(element_type))
 
-  def AddAttribute(self, getter, setter):
+  def AddAttribute(self, attribute):
+    getter = attribute
+    setter = attribute if not IsReadOnly(attribute) else None
     dom_name = DartDomNameOfAttribute(getter or setter)
     html_getter_name = None
     if not self._shared.IsCustomInHtmlLibrary(
         self._interface, dom_name, 'get:'):
       html_getter_name = self._shared.RenameInHtmlLibrary(
           self._interface.id, dom_name, 'get:',
           implementation_class=True)
     html_setter_name = None
     if not self._shared.IsCustomInHtmlLibrary(
         self._interface, dom_name, 'set:'):
@@ skipping 158 matching lines @@
             Collect(database.GetInterface(parent.type.id),
                     seen, collected)
 
   inheritance_closure = {}
   for interface in database.GetInterfaces():
     seen = set()
     collected = []
     Collect(interface, seen, collected)
     inheritance_closure[interface.id] = collected
   return inheritance_closure