add a download slices table into history download db

chrome/browser/download/download_history.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.
 
 // DownloadHistory manages persisting DownloadItems to the history service by
 // observing a single DownloadManager and all its DownloadItems using an
 // AllDownloadItemNotifier.
 //
 // DownloadHistory decides whether and when to add items to, remove items from,
 // and update items in the database. DownloadHistory uses DownloadHistoryData to
@@ skipping 122 matching lines @@
       item->GetTabReferrerUrl(),
       std::string(),  // HTTP method (not available yet)
       item->GetMimeType(), item->GetOriginalMimeType(), item->GetStartTime(),
       item->GetEndTime(), item->GetETag(), item->GetLastModifiedTime(),
       item->GetReceivedBytes(), item->GetTotalBytes(),
       history::ToHistoryDownloadState(item->GetState()),
       history::ToHistoryDownloadDangerType(item->GetDangerType()),
       history::ToHistoryDownloadInterruptReason(item->GetLastReason()),
       std::string(),  // Hash value (not available yet)
       history::ToHistoryDownloadId(item->GetId()), item->GetGuid(),
-      item->GetOpened(), by_ext_id, by_ext_name);
+      item->GetOpened(), by_ext_id, by_ext_name,
+      // TODO(qinmin): get the slice information.
+      std::vector<history::DownloadSliceInfo>());
 }
 
 enum class ShouldUpdateHistoryResult {
   NO_UPDATE,
   UPDATE,
   UPDATE_IMMEDIATELY,
 };
 
 ShouldUpdateHistoryResult ShouldUpdateHistory(
     const history::DownloadRow* previous,
@@ skipping 335 matching lines @@
 }
 
 void DownloadHistory::RemoveDownloadsBatch() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   IdSet remove_ids;
   removing_ids_.swap(remove_ids);
   history_->RemoveDownloads(remove_ids);
   for (Observer& observer : observers_)
     observer.OnDownloadsRemoved(remove_ids);
 }