Eliminate NOTIFICATION_HISTORY_LOADED notification

chrome/browser/history/history_service.cc

 // Copyright (c) 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.
 
 // The history system runs on a background thread so that potentially slow
 // database operations don't delay the browser. This backend processing is
 // represented by HistoryBackend. The HistoryService's job is to dispatch to
 // that thread.
 //
 // Main thread                       History thread
@@ skipping 1209 matching lines @@
   // backend has allocated for us. The receiver of the notification will cast
   // this to the proper type.
   content::Details<history::HistoryDetails> det(details.get());
 
   content::NotificationService::current()->Notify(type, source, det);
 }
 
 void HistoryService::OnDBLoaded() {
   DCHECK(thread_checker_.CalledOnValidThread());
   backend_loaded_ = true;
-  content::NotificationService::current()->Notify(
-      chrome::NOTIFICATION_HISTORY_LOADED,
-      content::Source<Profile>(profile_),
-      content::Details<HistoryService>(this));
+  NotifyHistoryServiceLoaded();
 }
 
 bool HistoryService::GetRowForURL(const GURL& url, history::URLRow* url_row) {
   DCHECK(thread_checker_.CalledOnValidThread());
   history::URLDatabase* db = InMemoryDatabase();
   return db && (db->GetRowForURL(url, url_row) != 0);
 }
 
 void HistoryService::NotifyAddVisit(const history::BriefVisitInfo& info) {
   DCHECK(thread_checker_.CalledOnValidThread());
@@ skipping 16 matching lines @@
     const HistoryService::OnFaviconChangedCallback& callback) {
   DCHECK(thread_checker_.CalledOnValidThread());
   return favicon_changed_callback_list_.Add(callback);
 }
 
 void HistoryService::NotifyFaviconChanged(
     const std::set<GURL>& changed_favicons) {
   DCHECK(thread_checker_.CalledOnValidThread());
   favicon_changed_callback_list_.Notify(changed_favicons);
 }
+
+void HistoryService::NotifyHistoryServiceLoaded() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  FOR_EACH_OBSERVER(
+      history::HistoryServiceObserver,
+      observers_,
+      OnHistoryServiceLoaded(this));
+}