Changes instant so that the newly created tab has a new id. Doing

chrome/browser/extensions/extension_browser_event_router.cc

Index: chrome/browser/extensions/extension_browser_event_router.cc
diff --git a/chrome/browser/extensions/extension_browser_event_router.cc b/chrome/browser/extensions/extension_browser_event_router.cc
index 6df9edee8c18202ada80bb0ee375b2d1d6bc0ebb..79939494f4ca1c7cd131e566d94f3320f379b069 100644
--- a/chrome/browser/extensions/extension_browser_event_router.cc
+++ b/chrome/browser/extensions/extension_browser_event_router.cc
@@ -466,11 +466,13 @@ void ExtensionBrowserEventRouter::TabChangedAt(TabContentsWrapper* contents,
 }
 
 void ExtensionBrowserEventRouter::TabReplacedAt(
+    TabStripModel* tab_strip_model,
     TabContentsWrapper* old_contents,
     TabContentsWrapper* new_contents,
     int index) {
-  UnregisterForTabNotifications(old_contents->tab_contents());
-  RegisterForTabNotifications(new_contents->tab_contents());
+  TabClosingAt(tab_strip_model, old_contents, index);
+  TabInsertedAt(new_contents, index,
+                tab_strip_model->selected_index() == index);
 }
 
 void ExtensionBrowserEventRouter::TabPinnedStateChanged(