Disable an extension when it is upgraded to a version that requires more

chrome/common/notification_type.h

 // Copyright (c) 2006-2008 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 585 matching lines @@
     // Extensions --------------------------------------------------------------
 
     // Sent when the known installed extensions have all been loaded.  In
     // testing scenarios this can happen multiple times if extensions are
     // unloaded and reloaded.
     EXTENSIONS_READY,
 
     // Sent when new extensions are loaded. The details are an ExtensionList*.
     EXTENSIONS_LOADED,
 
+    // Sent when attempting to load a new extension, but they are disabled. The
+    // details are an Extension*.
+    EXTENSION_UPDATE_DISABLED,
+
     // Sent when a new theme is installed. The details are an Extension.
     THEME_INSTALLED,
 
     // Sent when new extensions are installed. The details are an Extension.
     EXTENSION_INSTALLED,
 
     // Sent when an extension is unloaded. This happens when an extension is
     // uninstalled. When we add a disable feature, it will also happen then.
     // The details are an Extension.  Note that when this notification is sent,
     // ExtensionsService has already removed the extension from its internal
@@ skipping 43 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_