Remove TopSites notification in favor of Observers

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 256 matching lines @@
 
   // Sent before a Profile is destroyed. This notification is sent both for
   // normal and OTR profiles.
   // The details are none and the source is a Profile*.
   NOTIFICATION_PROFILE_DESTROYED,
 
   // Sent after the URLRequestContextGetter for a Profile has been initialized.
   // The details are none and the source is a Profile*.
   NOTIFICATION_PROFILE_URL_REQUEST_CONTEXT_GETTER_INITIALIZED,
 
-  // TopSites ----------------------------------------------------------------
-
-  // Sent by TopSites when it finishes loading. The source is the profile the
-  // details the TopSites.
-  NOTIFICATION_TOP_SITES_LOADED,
-
-  // Sent by TopSites when the either one of the most visited urls changed, or
-  // one of the images changes. The source is the TopSites, the details not
-  // used.
-  NOTIFICATION_TOP_SITES_CHANGED,
-
   // Task Manager ------------------------------------------------------------
 
   // Sent when a renderer process is notified of new v8 heap statistics. The
   // source is the ID of the renderer process, and the details are a
   // V8HeapStatsDetails object.
   NOTIFICATION_RENDERER_V8_HEAP_STATS_COMPUTED,
 
   // Non-history storage services --------------------------------------------
 
   // The state of a web resource has been changed. A resource may have been
@@ skipping 361 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_