Makes instant support other open dispositions.

chrome/browser/tab_contents/navigation_controller.h

Index: chrome/browser/tab_contents/navigation_controller.h
diff --git a/chrome/browser/tab_contents/navigation_controller.h b/chrome/browser/tab_contents/navigation_controller.h
index 574425a16300be471a685f6125f9cdf8c7a8ecf5..24a206f192fb55ee10ab96ec5d37d2d972cd6639 100644
--- a/chrome/browser/tab_contents/navigation_controller.h
+++ b/chrome/browser/tab_contents/navigation_controller.h
@@ -374,6 +374,10 @@ class NavigationController {
   // This ignores the transient index of the source and honors that of 'this'.
   void CopyStateFromAndPrune(const NavigationController& source);
 
+  // Removes all the entries except the active entry. If there is a new pending
+  // navigation it is preserved.
+  void PruneAllButActive();
+
   // Random data ---------------------------------------------------------------
 
   // Returns the identifier used by session restore.
@@ -517,10 +521,6 @@ class NavigationController {
       const std::vector<TabNavigation>& navigations,
       std::vector<linked_ptr<NavigationEntry> >* entries);
 
-  // Removes all the entries except the active entry. If there is a new pending
-  // navigation it is preserved.
-  void PruneAllButActive();
-
   // Inserts up to |max_index| entries from |source| into this. This does NOT
   // adjust any of the members that reference entries_
   // (last_committed_entry_index_, pending_entry_index_ or