This CL adds a test to insure we are not regressing on http://crbug.com/19941...

chrome/common/notification_type.h

 // Copyright (c) 2009 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_COMMON_NOTIFICATION_TYPE_H_
 #define CHROME_COMMON_NOTIFICATION_TYPE_H_
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
 //
@@ skipping 213 matching lines @@
     // Sent after an application-modal dialog has been shown. The source
     // is the dialog.
     APP_MODAL_DIALOG_SHOWN,
 
     // Sent after an application-modal dialog has been closed. The source
     // is the dialog.
     APP_MODAL_DIALOG_CLOSED,
 
     // Tabs --------------------------------------------------------------------
 
+    // Sent when a tab is added to a TabContentsDelegate. The source is the
+    // TabContentsDelegate and the details is the TabContents.
+    TAB_ADDED,
+
     // This notification is sent after a tab has been appended to the
     // tab_strip.  The source is a Source<NavigationController> with a pointer
     // to controller for the added tab. There are no details.
     TAB_PARENTED,
 
     // This message is sent before a tab has been closed.  The source is a
     // Source<NavigationController> with a pointer to the controller for the
     // closed tab.  No details are expected.
     //
     // See also TAB_CLOSED.
@@ skipping 452 matching lines @@
 };
 
 inline bool operator==(NotificationType::Type a, NotificationType b) {
   return a == b.value;
 }
 inline bool operator!=(NotificationType::Type a, NotificationType b) {
   return a != b.value;
 }
 
 #endif  // CHROME_COMMON_NOTIFICATION_TYPE_H_