InstantExtended: Transient naventry for preview.

chrome/browser/instant/instant_loader.cc

Index: chrome/browser/instant/instant_loader.cc
diff --git a/chrome/browser/instant/instant_loader.cc b/chrome/browser/instant/instant_loader.cc
index 2d2ea420d0afb049c77ae58f5b3a456d0c0561f6..e8063ec39be180c066f63bf56ee6f90c41daa02e 100644
--- a/chrome/browser/instant/instant_loader.cc
+++ b/chrome/browser/instant/instant_loader.cc
@@ -14,6 +14,7 @@
 #include "chrome/browser/ui/search/search_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
 #include "chrome/browser/ui/tab_contents/core_tab_helper_delegate.h"
+#include "content/public/browser/navigation_entry.h"
 #include "content/public/browser/notification_source.h"
 #include "content/public/browser/notification_types.h"
 #include "content/public/browser/render_widget_host_view.h"
@@ -287,6 +288,9 @@ void InstantLoader::InstantSupportDetermined(bool supports_instant) {
     return;
 
   supports_instant_ = supports_instant;
+  const content::NavigationEntry* entry =
+      contents()->GetController().GetVisibleEntry();
+  base_navigation_entry_.reset(content::NavigationEntry::Create(*entry));
   controller_->InstantSupportDetermined(contents(), supports_instant);
 }