Fix an issue that temp files are left permanently on storage after chrome crash

components/history/core/browser/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 "components/history/core/browser/history_backend.h"
 
 #include <algorithm>
 #include <functional>
 #include <list>
 #include <map>
@@ skipping 1150 matching lines @@
   return db_ ? db_->GetNextDownloadId() : kInvalidDownloadId;
 }
 
 // Get all the download entries from the database.
 void HistoryBackend::QueryDownloads(std::vector<DownloadRow>* rows) {
   if (db_)
     db_->QueryDownloads(rows);
 }
 
 // Update a particular download entry.
-void HistoryBackend::UpdateDownload(const DownloadRow& data) {
+void HistoryBackend::UpdateDownload(
+    const DownloadRow& data,
+    bool should_commit_immediately) {
   if (!db_)
     return;
   db_->UpdateDownload(data);
-  ScheduleCommit();
+  if (should_commit_immediately)
+    Commit();
+  else
+    ScheduleCommit();
 }
 
 bool HistoryBackend::CreateDownload(const DownloadRow& history_info) {
   if (!db_)
     return false;
   bool success = db_->CreateDownload(history_info);
 #if defined(OS_ANDROID)
   // On android, browser process can get easily killed. Download will no longer
   // be able to resume and the temporary file will linger forever if the
   // download is not committed before that. Do the commit right away to avoid
@@ skipping 1455 matching lines @@
   // transaction is currently open.
   db_->CommitTransaction();
   db_->Vacuum();
   db_->BeginTransaction();
   db_->GetStartDate(&first_recorded_time_);
 
   return true;
 }
 
 }  // namespace history