Linux: delete the unencrypted login database file after a successful password migration.

app/sql/meta_table.cc

 // Copyright (c) 2009 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 "app/sql/meta_table.h"
 
 #include "app/sql/connection.h"
 #include "app/sql/statement.h"
 #include "base/logging.h"
 #include "base/string_util.h"
@@ skipping 27 matching lines @@
 
     // Note: there is no index over the meta table. We currently only have a
     // couple of keys, so it doesn't matter. If we start storing more stuff in
     // there, we should create an index.
     SetVersionNumber(version);
     SetCompatibleVersionNumber(compatible_version);
   }
   return true;
 }
 
+void MetaTable::Reset() {
+  db_ = NULL;
+}
+
 bool MetaTable::SetValue(const char* key, const std::string& value) {
   Statement s;
   if (!PrepareSetStatement(&s, key))
     return false;
   s.BindString(1, value);
   return s.Run();
 }
 
 bool MetaTable::GetValue(const char* key, std::string* value) {
   Statement s;
@@ skipping 81 matching lines @@
     NOTREACHED() << db_->GetErrorMessage();
     return false;
   }
   statement->BindCString(0, key);
   if (!statement->Step())
     return false;
   return true;
 }
 
 }  // namespace sql
-