Revert "Currently, base/timer.cc calls PostTask with FROM_HERE as the Location,

chrome/browser/chromeos/login/update_screen.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/chromeos/login/update_screen.h"
 
 #include "base/file_util.h"
 #include "base/logging.h"
 #include "base/threading/thread_restrictions.h"
 #include "chrome/browser/chromeos/cros/cros_library.h"
@@ skipping 138 matching lines @@
       break;
     case UPDATE_STATUS_UPDATED_NEED_REBOOT:
       MakeSureScreenIsShown();
       // Make sure that first OOBE stage won't be shown after reboot.
       WizardController::MarkOobeCompleted();
       actor_->SetProgress(kProgressComplete);
       if (HasCriticalUpdate()) {
         actor_->ShowCurtain(false);
         VLOG(1) << "Initiate reboot after update";
         CrosLibrary::Get()->GetUpdateLibrary()->RebootAfterUpdate();
-        reboot_timer_.Start(FROM_HERE,
-                            base::TimeDelta::FromSeconds(reboot_check_delay_),
+        reboot_timer_.Start(base::TimeDelta::FromSeconds(reboot_check_delay_),
                             this,
                             &UpdateScreen::OnWaitForRebootTimeElapsed);
       } else {
         ExitUpdate(REASON_UPDATE_NON_CRITICAL);
       }
       break;
     case UPDATE_STATUS_IDLE:
       if (ignore_idle_status_) {
         // It is first IDLE status that is sent before we initiated the check.
         break;
@@ skipping 126 matching lines @@
   // if the file exists and not empty, there is critical update.
   return true;
 }
 
 void UpdateScreen::OnActorDestroyed(UpdateScreenActor* actor) {
   if (actor_ == actor)
     actor_ = NULL;
 }
 
 }  // namespace chromeos