Downloads: Added transient flag to download item and download database

components/history/core/browser/history_database.cc

Index: components/history/core/browser/history_database.cc
diff --git a/components/history/core/browser/history_database.cc b/components/history/core/browser/history_database.cc
index b7b90b06ac892849e2adef55c77460909da100e9..72b548e171856c93681961a6a75c7119cd08d9b7 100644
--- a/components/history/core/browser/history_database.cc
+++ b/components/history/core/browser/history_database.cc
@@ -570,6 +570,15 @@ sql::InitStatus HistoryDatabase::EnsureCurrentVersion() {
     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()) <<