Adding an experimental app notification API.

content/common/notification_type.h

 // Copyright (c) 2011 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 CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #define CONTENT_COMMON_NOTIFICATION_TYPE_H_
 #pragma once
 
 // This file describes various types used to describe and filter notifications
 // that pass through the NotificationService.
@@ skipping 959 matching lines @@
     // installed extensions. The source is a Profile, and there are no details.
     // NOTE: It's possible that there are extension updates still being
     // installed by the extension service at the time this notification fires.
     EXTENSION_UPDATING_FINISHED,
 
     // The extension updater found an update and will attempt to download and
     // install it. The source is a Profile, and the details are an extension id
     // (const std::string).
     EXTENSION_UPDATE_FOUND,
 
+    // An installed app changed notification state (added or removed
+    // notifications). The source is a Profile, and there are no details.
+    APP_NOTIFICATION_STATE_CHANGED,
+
     // Desktop Notifications ---------------------------------------------------
 
     // This notification is sent when a balloon is connected to a renderer
     // process to render the balloon contents.  The source is a
     // Source<BalloonHost> with a pointer to the the balloon.  A
     // NOTIFY_BALLOON_DISCONNECTED is guaranteed before the source pointer
     // becomes junk. No details expected.
     NOTIFY_BALLOON_CONNECTED,
 
     // This message is sent after a balloon is disconnected from the renderer
@@ skipping 354 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  // CONTENT_COMMON_NOTIFICATION_TYPE_H_