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

chrome/browser/ui/views/tabs/browser_tab_strip_controller.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_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 #define CHROME_BROWSER_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_
 #pragma once
 
 #include "base/scoped_ptr.h"
 #include "chrome/browser/tabs/tab_strip_model.h"
@@ skipping 53 matching lines @@
   virtual void TabSelectedAt(TabContentsWrapper* old_contents,
                              TabContentsWrapper* contents,
                              int model_index,
                              bool user_gesture);
   virtual void TabMoved(TabContentsWrapper* contents,
                         int from_model_index,
                         int to_model_index);
   virtual void TabChangedAt(TabContentsWrapper* contents,
                             int model_index,
                             TabChangeType change_type);
-  virtual void TabReplacedAt(TabContentsWrapper* old_contents,
+  virtual void TabReplacedAt(TabStripModel* tab_strip_model,
+                             TabContentsWrapper* old_contents,
                              TabContentsWrapper* new_contents,
                              int model_index);
   virtual void TabPinnedStateChanged(TabContentsWrapper* contents,
                                      int model_index);
   virtual void TabMiniStateChanged(TabContentsWrapper* contents,
                                    int model_index);
   virtual void TabBlockedStateChanged(TabContentsWrapper* contents,
                                       int model_index);
 
   // NotificationObserver implementation:
@@ skipping 30 matching lines @@
   // If non-NULL it means we're showing a menu for the tab.
   scoped_ptr<TabContextMenuContents> context_menu_contents_;
 
   NotificationRegistrar notification_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserTabStripController);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_BROWSER_TAB_STRIP_CONTROLLER_H_