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

chrome/browser/download/download_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.
 
 #include "chrome/browser/download/download_history.h"
 
 #include "base/logging.h"
 #include "chrome/browser/history/download_history_info.h"
 #include "chrome/browser/history/history_marshaling.h"
 #include "chrome/browser/download/download_item.h"
@@ skipping 15 matching lines @@
 DownloadHistory::~DownloadHistory() {
   // For any outstanding requests to
   // HistoryService::GetVisibleVisitCountToHost(), since they'll be cancelled
   // and thus not call back to OnGotVisitCountToHost(), we need to delete the
   // associated VisitedBeforeDoneCallbacks.
   for (VisitedBeforeRequestsMap::iterator i(visited_before_requests_.begin());
        i != visited_before_requests_.end(); ++i)
     delete i->second.second;
 }
 
+void DownloadHistory::GetNextId(
+    HistoryService::DownloadNextIdCallback* callback) {
+  DCHECK(callback);
+  HistoryService* hs = profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
+  if (!hs) {
+    delete callback;
+    return;
+  }
+  hs->GetNextDownloadId(&history_consumer_, callback);
+}
+
 void DownloadHistory::Load(HistoryService::DownloadQueryCallback* callback) {
   DCHECK(callback);
   HistoryService* hs = profile_->GetHistoryService(Profile::EXPLICIT_ACCESS);
   if (!hs) {
     delete callback;
     return;
   }
   hs->QueryDownloads(&history_consumer_, callback);
 
   // This is the initial load, so do a cleanup of corrupt in-progress entries.
@@ skipping 102 matching lines @@
   VisitedBeforeRequestsMap::iterator request =
       visited_before_requests_.find(handle);
   DCHECK(request != visited_before_requests_.end());
   int32 download_id = request->second.first;
   VisitedBeforeDoneCallback* callback = request->second.second;
   visited_before_requests_.erase(request);
   callback->Run(download_id, found_visits && count &&
       (first_visit.LocalMidnight() < base::Time::Now().LocalMidnight()));
   delete callback;
 }