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

chrome/browser/extensions/extension_browser_event_router.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
 #define CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_
 #pragma once
 
 #include <map>
 #include <string>
@@ skipping 55 matching lines @@
                             int index);
   virtual void TabDetachedAt(TabContentsWrapper* contents, int index);
   virtual void TabSelectedAt(TabContentsWrapper* old_contents,
                              TabContentsWrapper* new_contents,
                              int index,
                              bool user_gesture);
   virtual void TabMoved(TabContentsWrapper* contents, int from_index,
                         int to_index);
   virtual void TabChangedAt(TabContentsWrapper* contents, int index,
                             TabChangeType change_type);
-  virtual void TabReplacedAt(TabContentsWrapper* old_contents,
+  virtual void TabReplacedAt(TabStripModel* tab_strip_model,
+                             TabContentsWrapper* old_contents,
                              TabContentsWrapper* new_contents,
                              int index);
   virtual void TabPinnedStateChanged(TabContentsWrapper* contents, int index);
   virtual void TabStripEmpty();
 
   // Page Action execute event.
   void PageActionExecuted(Profile* profile,
                           const std::string& extension_id,
                           const std::string& page_action_id,
                           int tab_id,
@@ skipping 96 matching lines @@
   int focused_window_id_;
 
   // The main profile (non-OTR) profile which will be used to send events not
   // associated with any browser.
   Profile* profile_;
 
   DISALLOW_COPY_AND_ASSIGN(ExtensionBrowserEventRouter);
 };
 
 #endif  // CHROME_BROWSER_EXTENSIONS_EXTENSION_BROWSER_EVENT_ROUTER_H_