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

chrome/browser/browser_main_win.cc

Index: chrome/browser/browser_main_win.cc
diff --git a/chrome/browser/browser_main_win.cc b/chrome/browser/browser_main_win.cc
index ee8f9eb1e1b33cf331b4ba8c7236e4ffa689945b..1804ae9af43da87710d79ca54e4e502baedd23c4 100644
--- a/chrome/browser/browser_main_win.cc
+++ b/chrome/browser/browser_main_win.cc
@@ -21,7 +21,7 @@
 #include "base/win/windows_version.h"
 #include "base/win/wrapped_window_proc.h"
 #include "chrome/browser/first_run/first_run.h"
-#include "chrome/browser/first_run/upgrade.h"
+#include "chrome/browser/first_run/upgrade_utils.h"
 #include "chrome/browser/metrics/metrics_service.h"
 #include "chrome/browser/ui/browser_list.h"
 #include "chrome/browser/ui/views/uninstall_view.h"
@@ -110,7 +110,7 @@ int DoUninstallTasks(bool chrome_still_running) {
     return ResultCodes::UNINSTALL_CHROME_ALIVE;
   }
   int ret = AskForUninstallConfirmation();
-  if (Upgrade::IsBrowserAlreadyRunning()) {
+  if (upgrade_utils::IsBrowserAlreadyRunning()) {
     ShowCloseBrowserFirstMessageBox();
     return ResultCodes::UNINSTALL_CHROME_ALIVE;
   }