Downloads: Added transient flag to download item and download database

components/history/core/browser/history_database.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_database.h"
 
 #include <stdint.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 552 matching lines @@
     // autofill_model_type_state tables are introduced, no migration needed for
     // those two tables.
     if (!RecreateURLTableWithAllContents()) {
       LOG(WARNING) << "Unable to update history database to version 35.";
       return sql::INIT_FAILURE;
     }
     cur_version++;
     meta_table_.SetVersionNumber(cur_version);
   }
 
+  if (cur_version == 35) {
+    if (!MigrateDownloadTransient()) {
+      LOG(WARNING) << "Unable to migrate to version 35";
+      return sql::INIT_FAILURE;
+    }
+    cur_version++;
+    meta_table_.SetVersionNumber(cur_version);
+  }
+
   // When the version is too old, we just try to continue anyway, there should
   // not be a released product that makes a database too old for us to handle.
   LOG_IF(WARNING, cur_version < GetCurrentVersion()) <<
          "History database version " << cur_version << " is too old to handle.";
 
   return sql::INIT_OK;
 }
 
 #if !defined(OS_WIN)
 void HistoryDatabase::MigrateTimeEpoch() {
   // Update all the times in the URLs and visits table in the main database.
   ignore_result(db_.Execute(
       "UPDATE urls "
       "SET last_visit_time = last_visit_time + 11644473600000000 "
       "WHERE id IN (SELECT id FROM urls WHERE last_visit_time > 0);"));
   ignore_result(db_.Execute(
       "UPDATE visits "
       "SET visit_time = visit_time + 11644473600000000 "
       "WHERE id IN (SELECT id FROM visits WHERE visit_time > 0);"));
   ignore_result(db_.Execute(
       "UPDATE segment_usage "
       "SET time_slot = time_slot + 11644473600000000 "
       "WHERE id IN (SELECT id FROM segment_usage WHERE time_slot > 0);"));
 }
 #endif
 
 }  // namespace history