Add tests for version migration tesing in for LoginDatabase.

components/password_manager/core/browser/login_database.h

 // Copyright 2014 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.
 
 #ifndef COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_
 #define COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_
 
 #include <string>
 #include <vector>
 
 #include "base/files/file_path.h"
 #include "base/pickle.h"
 #include "base/strings/string16.h"
 #include "components/password_manager/core/browser/password_store_change.h"
 #include "components/password_manager/core/browser/psl_matching_helper.h"
 #include "sql/connection.h"
 #include "sql/meta_table.h"
 
 namespace password_manager {
 
+extern const int kCurrentVersionNumber;
+
 // Interface to the database storage of login information, intended as a helper
 // for PasswordStore on platforms that need internal storage of some or all of
 // the login information.
 class LoginDatabase {
  public:
   LoginDatabase();
   virtual ~LoginDatabase();
 
   // Initialize the database with an sqlite file at the given path.
   // If false is returned, no other method should be called.
@@ skipping 116 matching lines @@
   base::FilePath db_path_;
   mutable sql::Connection db_;
   sql::MetaTable meta_table_;
 
   DISALLOW_COPY_AND_ASSIGN(LoginDatabase);
 };
 
 }  // namespace password_manager
 
 #endif  // COMPONENTS_PASSWORD_MANAGER_CORE_BROWSER_LOGIN_DATABASE_H_