Implemented screen notifying users about malformed HWID.

chrome/browser/chromeos/login/hwid_checker.h

+// Copyright (c) 2013 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 CHROME_BROWSER_CHROMEOS_LOGIN_HWID_CHECKER_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_HWID_CHECKER_H_
+
+#include <string>
+
+namespace chromeos {
+
+// Calculates checksum for given string as it made for HWID v1 and v2.
+std::string CalculateHWIDChecksum(const std::string& data);
+
+// Checks if given HWID correct in terms of HWID v1 or v2.
+bool IsHWIDCorrect(const std::string& hwid);
+
+// Checks if current machine has correct HWID v1 or v2.
+bool IsMachineHWIDCorrect();
+
+} // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_HWID_CHECKER_H_
+