Generate and use cross frame wrappers for types in other frames/windows.

lib/dom/scripts/dartgenerator.py

Index: lib/dom/scripts/dartgenerator.py
diff --git a/lib/dom/scripts/dartgenerator.py b/lib/dom/scripts/dartgenerator.py
index 250583230c9306774143010d028afe99a9131624..65a6e8be26c976f357f5ace0ff0b46c435035d4d 100755
--- a/lib/dom/scripts/dartgenerator.py
+++ b/lib/dom/scripts/dartgenerator.py
@@ -244,6 +244,11 @@ class DartGenerator(object):
           TemplateLoader(self._template_dir, ['html/interface', 'html', '']),
           self._database, self._emitters, self._output_dir, self)
       self._systems.append(html_interface_system)
+
+      html_cross_frame_system = HtmlCrossFrameSystem(
+          TemplateLoader(self._template_dir, ['html', '']),
+          self._database, self._emitters, self._output_dir, self)
+      self._systems.append(html_cross_frame_system)
     else:
       interface_system = InterfacesSystem(
           TemplateLoader(self._template_dir, ['dom/interface', 'dom', '']),
@@ -294,6 +299,7 @@ class DartGenerator(object):
           self._database, self._emitters, self._output_dir, self)
 
       html_system._interface_system = html_interface_system
+      html_system._cross_frame_system = html_cross_frame_system
       self._systems.append(html_system)
 
     if 'htmldartium' in systems:
@@ -305,6 +311,7 @@ class DartGenerator(object):
           self._output_dir, self)
 
       html_system._interface_system = html_interface_system
+      html_system._cross_frame_system = html_cross_frame_system
       self._systems.append(html_system)
 
     # Collect interfaces