Enable cross frame window operations

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."""
 
 from systemfrog import *
 from systeminterface import *
@@ skipping 257 matching lines @@
     "IFrameElement.get:contentDocument",
     "Window.get:frameElement",
     ])
 
 _html_library_custom = set([
     'IFrameElement.get:contentWindow',
     'Window.get:document',
     'Window.get:top',
     'Window.get:location',
     'Window.set:location',
+    'Window.open',
     'IDBDatabase.transaction',
     ])
 
 # This map controls merging of interfaces in dart:html library.
 # All constants, attributes, and operations of merged interface (key) are
 # added to target interface (value). All references to the merged interface
 # (e.g. parameter types, return types, parent interfaces) are replaced with
 # target interface. There are two important restrictions:
 # 1) Merged and target interfaces shouldn't have common members, otherwise there
 # would be duplicated declarations in generated Dart code.
@@ skipping 1169 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