Safely wrap window.top in frog dom.

client/dom/scripts/systemfrog.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 systems to generate
 frog binding from the IDL database."""
 
 import os
 from generator import *
 from systembase import *
 
 # Members (getters, setters, and methods) to suppress.  These are
 # either removed or custom implemented.
 _dom_frog_omitted_members = set([
     # Replace with custom.
+    'DOMWindow.get:top',
     'HTMLIFrameElement.get:contentWindow',
 
     # Remove.
+    'DOMWindow.get:frameElement',
     'HTMLIFrameElement.get:contentDocument',
-    'DOMWindow.get:frameElement',
 ])
 
 class FrogSystem(System):
 
   def __init__(self, templates, database, emitters, output_dir):
     super(FrogSystem, self).__init__(
         templates, database, emitters, output_dir)
     self._impl_file_paths = []
 
   def InterfaceGenerator(self,
@@ skipping 331 matching lines @@
     if native_body:
       native_body = " '''" + native_body + "'''"
 
     self._members_emitter.Emit(
         '\n'
         '  $TYPE $NAME($PARAMS) native$NATIVESTRING;\n',
         TYPE=self._NarrowOutputType(info.type_name),
         NAME=info.name,
         PARAMS=params,
         NATIVESTRING=native_body)