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

chrome/browser/first_run/upgrade_util_linux.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 "chrome/browser/first_run/upgrade_util.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;
+namespace {
 
-// static
-double Upgrade::saved_last_modified_time_of_exe_ = 0;
+double saved_last_modified_time_of_exe = 0;
 
-// static
-bool Upgrade::RelaunchChromeBrowser(const CommandLine& command_line) {
+}  // namespace
+
+namespace upgrade_util {
+
+bool 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();
+bool IsUpdatePendingRestart() {
+  return saved_last_modified_time_of_exe != GetLastModifiedTimeOfExe();
 }
 
-// static
-bool Upgrade::IsUpdatePendingRestart() {
-  return saved_last_modified_time_of_exe_ !=
-      Upgrade::GetLastModifiedTimeOfExe();
+void SaveLastModifiedTimeOfExe() {
+  saved_last_modified_time_of_exe = GetLastModifiedTimeOfExe();
 }
 
-// static
-double Upgrade::GetLastModifiedTimeOfExe() {
+double 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_;
+    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 saved_last_modified_time_of_exe;
   }
   return exe_file_info.last_modified.ToDoubleT();
 }
 
-#endif  // defined(OS_LINUX) && !defined(OS_CHROMEOS)
+}  // namespace upgrade_util