[ChromeOS] Move ChromeOS upgrade check logic into UpgradeDetector.

chrome/browser/ui/toolbar/wrench_menu_model.cc

Index: chrome/browser/ui/toolbar/wrench_menu_model.cc
diff --git a/chrome/browser/ui/toolbar/wrench_menu_model.cc b/chrome/browser/ui/toolbar/wrench_menu_model.cc
index c1b5b4ad31f7bb21a8decb2619027108dafcc175..0862eb56681b356c86ffbcafaf519a73b01106d1 100644
--- a/chrome/browser/ui/toolbar/wrench_menu_model.cc
+++ b/chrome/browser/ui/toolbar/wrench_menu_model.cc
@@ -47,11 +47,6 @@
 #include "chrome/browser/ui/browser_window.h"
 #endif
 
-#if defined(OS_CHROMEOS)
-#include "chrome/browser/chromeos/cros/cros_library.h"
-#include "chrome/browser/chromeos/cros/update_library.h"
-#endif
-
 #if defined(OS_WIN)
 #include "chrome/browser/enumerate_modules_model_win.h"
 #endif
@@ -333,12 +328,7 @@ bool WrenchMenuModel::IsCommandIdEnabled(int command_id) const {
 
 bool WrenchMenuModel::IsCommandIdVisible(int command_id) const {
   if (command_id == IDC_UPGRADE_DIALOG) {
-#if defined(OS_CHROMEOS)
-    return (chromeos::CrosLibrary::Get()->GetUpdateLibrary()->status().status
-            == chromeos::UPDATE_STATUS_UPDATED_NEED_REBOOT);
-#else
     return UpgradeDetector::GetInstance()->notify_upgrade();
-#endif
   } else if (command_id == IDC_VIEW_INCOMPATIBILITIES) {
 #if defined(OS_WIN)
     EnumerateModulesModel* loaded_modules =