Make DownloadHistory observe manager, items

chrome/browser/history/history_backend.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.
 
 #include "chrome/browser/history/history_backend.h"
 
 #include <list>
 #include <map>
 #include <set>
 #include <vector>
@@ skipping 1222 matching lines @@
     int32 id,
     const content::DownloadPersistentStoreInfo& history_info) {
   int64 db_handle = 0;
   if (!request->canceled()) {
     if (db_.get())
       db_handle = db_->CreateDownload(history_info);
     request->ForwardResult(id, db_handle);
   }
 }
 
-void HistoryBackend::RemoveDownload(int64 db_handle) {
+void HistoryBackend::RemoveDownloads(const std::set<int64>& handles) {
   if (db_.get())
-    db_->RemoveDownload(db_handle);
-}
-
-void HistoryBackend::RemoveDownloadsBetween(const Time remove_begin,
-                                            const Time remove_end) {
-  if (db_.get())
-    db_->RemoveDownloadsBetween(remove_begin, remove_end);
+    db_->RemoveDownloads(handles);
 }
 
 void HistoryBackend::QueryHistory(scoped_refptr<QueryHistoryRequest> request,
                                   const string16& text_query,
                                   const QueryOptions& options) {
   if (request->canceled())
     return;
 
   TimeTicks beginning_time = TimeTicks::Now();
 
@@ skipping 1222 matching lines @@
   info.url_id = visit.url_id;
   info.time = visit.visit_time;
   info.transition = visit.transition;
   // If we don't have a delegate yet during setup or shutdown, we will drop
   // these notifications.
   if (delegate_.get())
     delegate_->NotifyVisitDBObserversOnAddVisit(info);
 }
 
 }  // namespace history