sql::MetaTable.next_download_id, DownloadManager::GetNextId()

chrome/browser/history/history.cc

 // Copyright (c) 2011 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 503 matching lines @@
 HistoryService::Handle HistoryService::CreateDownload(
     int32 id,
     const DownloadHistoryInfo& create_info,
     CancelableRequestConsumerBase* consumer,
     HistoryService::DownloadCreateCallback* callback) {
   return Schedule(PRIORITY_NORMAL, &HistoryBackend::CreateDownload, consumer,
                   new history::DownloadCreateRequest(callback), id,
                   create_info);
 }
 
+HistoryService::Handle HistoryService::GetNextDownloadId(
+    CancelableRequestConsumerBase* consumer,
+    DownloadNextIdCallback* callback) {
+  return Schedule(PRIORITY_NORMAL, &HistoryBackend::GetNextDownloadId, consumer,
+                  new history::DownloadNextIdRequest(callback));
+}
+
 // Handle queries for a list of all downloads in the history database's
 // 'downloads' table.
 HistoryService::Handle HistoryService::QueryDownloads(
     CancelableRequestConsumerBase* consumer,
     DownloadQueryCallback* callback) {
   return Schedule(PRIORITY_NORMAL, &HistoryBackend::QueryDownloads, consumer,
                   new history::DownloadQueryRequest(callback));
 }
 
 // Changes all IN_PROGRESS in the database entries to CANCELED.
@@ skipping 274 matching lines @@
     history::TopSites* ts = profile_->GetTopSitesWithoutCreating();
     if (ts)
       ts->MigrateFromHistory();
   }
 }
 
 void HistoryService::OnTopSitesReady() {
   ScheduleAndForget(PRIORITY_NORMAL,
                     &HistoryBackend::MigrateThumbnailsDatabase);
 }