Prerendered pages are swapped in at browser::Navigate time.

content/browser/tab_contents/tab_contents_view_helper.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/tab_contents/tab_contents_view_helper.h"
 
 #include "content/browser/renderer_host/render_view_host.h"
 #include "content/browser/renderer_host/render_widget_host.h"
 #include "content/browser/renderer_host/render_widget_host_view.h"
 #include "content/browser/tab_contents/tab_contents.h"
@@ skipping 49 matching lines @@
   // Create the new web contents. This will automatically create the new
   // WebContentsView. In the future, we may want to create the view separately.
   TabContents* new_contents =
       new TabContents(web_contents->GetBrowserContext(),
                       web_contents->GetSiteInstance(),
                       route_id,
                       static_cast<TabContents*>(web_contents),
                       NULL);
   new_contents->set_opener_web_ui_type(
       web_contents->GetWebUITypeForCurrentState());
+  new_contents->set_opener_origin(GURL(params.opener_security_origin));
   content::WebContentsView* new_view = new_contents->GetView();
 
   // TODO(brettw): It seems bogus that we have to call this function on the
   // newly created object and give it one of its own member variables.
   new_view->CreateViewForWidget(new_contents->GetRenderViewHost());
 
   // Save the created window associated with the route so we can show it later.
   pending_contents_[route_id] = new_contents;
 
   if (web_contents->GetDelegate())
@@ skipping 90 matching lines @@
   RenderWidgetHostView* widget_host_view = GetCreatedWidget(route_id);
   if (is_fullscreen) {
     widget_host_view->InitAsFullscreen(web_contents->GetRenderWidgetHostView());
   } else {
     widget_host_view->InitAsPopup(web_contents->GetRenderWidgetHostView(),
                                   initial_pos);
   }
   widget_host_view->GetRenderWidgetHost()->Init();
   return widget_host_view;
 }