Refactor HistoryService to not send NOTIFICATION_FAVICON_CHANGED

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 "extensions/browser/notification_types.h"
 
@@ skipping 245 matching lines @@
   NOTIFICATION_HISTORY_URLS_DELETED,
 
   // Sent when a keyword search term is updated. The source is the Profile and
   // the details is history::KeywordSearchUpdatedDetails.
   NOTIFICATION_HISTORY_KEYWORD_SEARCH_TERM_UPDATED,
 
   // Sent when a keyword search term is deleted. The source is the Profile and
   // the details is history::KeywordSearchDeletedDetails.
   NOTIFICATION_HISTORY_KEYWORD_SEARCH_TERM_DELETED,
 
-  // Sent by history when the favicon of a URL changes.  The source is the
-  // profile, and the details is FaviconChangedDetails (see
-  // chrome/browser/favicon/favicon_changed_details.h).
-  NOTIFICATION_FAVICON_CHANGED,
-
   // Sent by FaviconTabHelper when a tab's favicon has been successfully
   // updated. The details are a bool indicating whether the
   // NavigationEntry's favicon URL has changed since the previous
   // NOTIFICATION_FAVICON_UPDATED notification. The details are true if
   // there was no previous NOTIFICATION_FAVICON_UPDATED notification for the
   // current NavigationEntry.
   NOTIFICATION_FAVICON_UPDATED,
 
   // Profiles -----------------------------------------------------------------
 
@@ skipping 420 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_