DISALLOW_COPY_AND_ASSIGN the TabStripModelObserver.

chrome/browser/ui/tabs/tab_strip_model_observer.cc

 // Copyright (c) 2012 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/ui/tabs/tab_strip_model_observer.h"
 
 using content::WebContents;
 
+TabStripModelObserver::TabStripModelObserver() {
+}
+
 void TabStripModelObserver::TabInsertedAt(TabStripModel* tab_strip_model,
                                           WebContents* contents,
                                           int index,
                                           bool foreground) {
 }
 
 void TabStripModelObserver::TabClosingAt(TabStripModel* tab_strip_model,
                                          WebContents* contents,
                                          int index) {
 }
@@ skipping 43 matching lines @@
 }
 
 void TabStripModelObserver::TabStripEmpty() {
 }
 
 void TabStripModelObserver::WillCloseAllTabs() {
 }
 
 void TabStripModelObserver::CloseAllTabsCanceled() {
 }