Move chromeos::version_loader to src/chromeos/system

chrome/browser/chromeos/version_loader.h

-// Copyright (c) 2011 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_VERSION_LOADER_H_
-#define CHROME_BROWSER_CHROMEOS_VERSION_LOADER_H_
-
-#include <string>
-
-namespace chromeos {
-namespace version_loader {
-
-enum VersionFormat {
-  VERSION_SHORT,
-  VERSION_SHORT_WITH_DATE,
-  VERSION_FULL,
-};
-
-// Gets the version.
-// If |full_version| is true version string with extra info is extracted,
-// otherwise it's in short format x.x.xx.x.
-// Must be run on a blocking thread pool.
-std::string GetVersion(VersionFormat format);
-
-// Gets the firmware info.
-// Must be run on a blocking thread pool.
-std::string GetFirmware();
-
-// Extracts the firmware from the file.
-std::string ParseFirmware(const std::string& contents);
-
-}  // namespace version_loader
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_VERSION_LOADER_H_