Separate the NTP app ordering from the app list app ordering

chrome/browser/chrome_notification_types.h

 // Copyright 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.
 
 #ifndef CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_
 #define CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_
 
 #include "build/build_config.h"
 #include "content/public/browser/notification_types.h"
 
@@ skipping 996 matching lines @@
   // represented by a vector of PasswordStoreChange. Each change includes a
   // change type (ADD, UPDATE, or REMOVE) as well as the
   // |content::PasswordForm|s that were affected.
   NOTIFICATION_LOGINS_CHANGED,
 
   // Sent when the applications in the NTP app launcher have been reordered.
   // The details, if not NoDetails, is the std::string ID of the extension that
   // was moved.
   NOTIFICATION_EXTENSION_LAUNCHER_REORDERED,
 
+  // Sent when the applications in the app list have been reordered.
+  // The details, if not NoDetails, is the std::string ID of the extension that
+  // was moved.
+  NOTIFICATION_APP_LIST_REORDERED,

[sky, 2013/08/19 15:58:55]

Aren't we in the process of nuking NotificationService?
https://code.google.com/p/chromium/issues/detail?id=268984

[calamity, 2013/08/20 05:05:18]

Added AppListExtensionSortingObserver.

+
   // Sent when an app is installed and an NTP has been shown. Source is the
   // WebContents that was shown, and Details is the string ID of the extension
   // which was installed.
   NOTIFICATION_APP_INSTALLED_TO_NTP,
 
   // Similar to NOTIFICATION_APP_INSTALLED_TO_NTP but used to nofity ash AppList
   // about installed app. Source is the profile in which the app is installed
   // and Details is the string ID of the extension.
   NOTIFICATION_APP_INSTALLED_TO_APPLIST,
 
@@ skipping 102 matching lines @@
   // Note:-
   // Currently only Content and Chrome define and use notifications.
   // Custom notifications not belonging to Content and Chrome should start
   // from here.
   NOTIFICATION_CHROME_END,
 };
 
 }  // namespace chrome
 
 #endif  // CHROME_BROWSER_CHROME_NOTIFICATION_TYPES_H_