Additional fixes for prerender/instant + browsing history.

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 0a7403a2897691f27483ea3c82f1884c8d6eb55c..f29ac0697c349828f776267a30d908d96165cd7e 100644
--- a/content/browser/tab_contents/tab_contents.h
+++ b/content/browser/tab_contents/tab_contents.h
@@ -627,8 +627,9 @@ class TabContents : public PageNavigator,
   // moves the current page_id to the last entry in the list if it's valid.
   // This is mainly used when a prerendered page is swapped into the current
   // tab.
-  void SetHistoryLengthAndClear(int history_length);
-
+  void SetHistoryLengthAndClear(const SiteInstance* site_instance,
+                                int history_length,
+                                int32 page_id);
 
   // Misc non-view stuff -------------------------------------------------------