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

content/browser/tab_contents/tab_contents.h

Index: content/browser/tab_contents/tab_contents.h
diff --git a/content/browser/tab_contents/tab_contents.h b/content/browser/tab_contents/tab_contents.h
index b2bca0158e1748f0fac86f917bcceaa9120899da..74dab24d8e67f1c2e6bae37bade6ddc50372893b 100644
--- a/content/browser/tab_contents/tab_contents.h
+++ b/content/browser/tab_contents/tab_contents.h
@@ -115,6 +115,10 @@ class CONTENT_EXPORT TabContents
     opener_web_ui_type_ = opener_web_ui_type;
   }
 
+  void set_has_opener(bool has_opener) {
+    has_opener_ = has_opener;
+  }
+
   JavaBridgeDispatcherHostManager* java_bridge_dispatcher_host_manager() const {
     return java_bridge_dispatcher_host_manager_.get();
   }
@@ -218,6 +222,7 @@ class CONTENT_EXPORT TabContents
   virtual content::WebUI::TypeID GetWebUITypeForCurrentState() OVERRIDE;
   virtual content::WebUI* GetWebUIForCurrentState() OVERRIDE;
   virtual bool GotResponseToLockMouseRequest(bool allowed) OVERRIDE;
+  virtual bool HasOpener() const OVERRIDE;
 
   // Implementation of PageNavigator.
   virtual content::WebContents* OpenURL(
@@ -662,6 +667,9 @@ class CONTENT_EXPORT TabContents
   // Our view type. Default is VIEW_TYPE_TAB_CONTENTS.
   content::ViewType view_type_;
 
+  // Is there an opener associated with this?
+  bool has_opener_;
+
   DISALLOW_COPY_AND_ASSIGN(TabContents);
 };