Implement sidebar support for extension action popups

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"
 
 #if defined(ENABLE_EXTENSIONS)
@@ skipping 322 matching lines @@
 
   // Sent when a non-default setting in the the notification content settings
   // map has changed. The source is the DesktopNotificationService, the
   // details are None.
   NOTIFICATION_DESKTOP_NOTIFICATION_SETTINGS_CHANGED,
 
   // Sent when content settings change for a tab. The source is a
   // content::WebContents object, the details are None.
   NOTIFICATION_WEB_CONTENT_SETTINGS_CHANGED,
 
+  // Sidebar -----------------------------------------------------------------

[Devlin, 2015/05/27 16:51:05]

We're working "hard" (read: we really want to, but bandwidth is hard to come by)
to deprecate notifications, so it'd be best to avoid adding any more, if we can.

+
+  // Sent when the sidebar state is changed.
+  // The source is a SidebarManager instance, the details are the changed
+  // SidebarContainer object.
+  NOTIFICATION_SIDEBAR_CHANGED,
+
   // Sync --------------------------------------------------------------------
 
   // The sync service has finished the datatype configuration process. The
   // source is the ProfileSyncService object of the Profile. There are no
   // details.
   NOTIFICATION_SYNC_CONFIGURE_DONE,
 
   // A service is requesting a sync datatype refresh for the current profile.
   // The details value is a const syncer::ModelTypeSet.
   // If the payload map is empty, it should be treated as an invalidation for
@@ skipping 246 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_