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

chrome/browser/tabs/tab_strip_model_observer.cc

 // 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.
 
 #include "chrome/browser/tabs/tab_strip_model_observer.h"
 
 void TabStripModelObserver::TabInsertedAt(TabContentsWrapper* contents,
                                           int index,
                                           bool foreground) {
 }
@@ skipping 20 matching lines @@
 void TabStripModelObserver::TabMoved(TabContentsWrapper* contents,
                                      int from_index,
                                      int to_index) {
 }
 
 void TabStripModelObserver::TabChangedAt(TabContentsWrapper* contents,
                                          int index,
                                          TabChangeType change_type) {
 }
 
-void TabStripModelObserver::TabReplacedAt(TabContentsWrapper* old_contents,
+void TabStripModelObserver::TabReplacedAt(TabStripModel* tab_strip_model,
+                                          TabContentsWrapper* old_contents,
                                           TabContentsWrapper* new_contents,
                                           int index) {
 }
 
 void TabStripModelObserver::TabPinnedStateChanged(TabContentsWrapper* contents,
                                                   int index) {
 }
 
 void TabStripModelObserver::TabMiniStateChanged(TabContentsWrapper* contents,
                                                 int index) {
 }
 
 void TabStripModelObserver::TabBlockedStateChanged(TabContentsWrapper* contents,
                                                    int index) {
 }
 
 void TabStripModelObserver::TabStripEmpty() {}
 
 void TabStripModelObserver::TabStripModelDeleted() {}