void RenderView::didClearWindowObject(WebFrame* frame) {
  if (BindingsPolicy::is_dom_automation_enabled(enabled_bindings_))
    BindDOMAutomationController(frame);
  if (BindingsPolicy::is_dom_ui_enabled(enabled_bindings_)) {
    dom_ui_bindings_.set_message_sender(this);
    dom_ui_bindings_.set_routing_id(routing_id_);
    dom_ui_bindings_.BindToJavascript(frame, L"chrome");
  }
  if (BindingsPolicy::is_external_host_enabled(enabled_bindings_)) {
    external_host_bindings_.set_message_sender(this);
    external_host_bindings_.set_routing_id(routing_id_);
    external_host_bindings_.BindToJavascript(frame, L"externalHost");
  }
}

Unknown