first-run: Refactor Upgrade class into a common upgrade_util API.

chrome/browser/first_run/upgrade_gtk.cc

-// 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.
-
-#include "chrome/browser/first_run/upgrade.h"
-
-#include "base/base_paths.h"
-#include "base/command_line.h"
-#include "base/file_path.h"
-#include "base/file_util.h"
-#include "base/logging.h"
-#include "base/path_service.h"
-#include "base/platform_file.h"
-#include "base/process_util.h"
-
-#if defined(OS_LINUX) && !defined(OS_CHROMEOS)
-// static
-CommandLine* Upgrade::new_command_line_ = NULL;
-
-// static
-double Upgrade::saved_last_modified_time_of_exe_ = 0;
-
-// static
-bool Upgrade::RelaunchChromeBrowser(const CommandLine& command_line) {
-  return base::LaunchApp(command_line, false, false, NULL);
-}
-
-// static
-void Upgrade::SaveLastModifiedTimeOfExe() {
-  saved_last_modified_time_of_exe_ = Upgrade::GetLastModifiedTimeOfExe();
-}
-
-// static
-bool Upgrade::IsUpdatePendingRestart() {
-  return saved_last_modified_time_of_exe_ !=
-      Upgrade::GetLastModifiedTimeOfExe();
-}
-
-// static
-double Upgrade::GetLastModifiedTimeOfExe() {
-  FilePath exe_file_path;
-  if (!PathService::Get(base::FILE_EXE, &exe_file_path)) {
-    LOG(WARNING) << "Failed to get FilePath object for FILE_EXE.";
-    return saved_last_modified_time_of_exe_;
-  }
-  base::PlatformFileInfo exe_file_info;
-  if (!file_util::GetFileInfo(exe_file_path, &exe_file_info)) {
-    LOG(WARNING) << "Failed to get FileInfo object for FILE_EXE - "
-                 << exe_file_path.value();
-    return saved_last_modified_time_of_exe_;
-  }
-  return exe_file_info.last_modified.ToDoubleT();
-}
-
-#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)