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

chrome/browser/component_updater/component_updater_service.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/component_updater/component_updater_service.h"
 
 #include <algorithm>
 #include <vector>
 
 #include "base/at_exit.h"
@@ skipping 318 matching lines @@
   // we avoid scheduling the timer if there is no work to do.
   running_ = true;
   if (work_items_.empty())
     return kOk;
 
   NotificationService::current()->Notify(
     chrome::NOTIFICATION_COMPONENT_UPDATER_STARTED,
     Source<ComponentUpdateService>(this),
     NotificationService::NoDetails());
 
-  timer_.Start(FROM_HERE, base::TimeDelta::FromSeconds(config_->InitialDelay()),
+  timer_.Start(base::TimeDelta::FromSeconds(config_->InitialDelay()),
                this, &CrxUpdateService::ProcessPendingItems);
   return kOk;
 }
 
 // Stop the main check + update loop. In flight operations will be
 // completed.
 ComponentUpdateService::Status CrxUpdateService::Stop() {
   running_ = false;
   timer_.Stop();
   return kOk;
@@ skipping 17 matching lines @@
   if (!step_delay) {
     NotificationService::current()->Notify(
         chrome::NOTIFICATION_COMPONENT_UPDATER_SLEEPING,
         Source<ComponentUpdateService>(this),
         NotificationService::NoDetails());
     // Zero is only used for unit tests.
     if (0 == delay)
       return;
   }
 
-  timer_.Start(FROM_HERE, base::TimeDelta::FromSeconds(delay),
+  timer_.Start(base::TimeDelta::FromSeconds(delay),
                this, &CrxUpdateService::ProcessPendingItems);
 }
 
 // Given a extension-like component id, find the associated component.
 CrxUpdateItem* CrxUpdateService::FindUpdateItemById(const std::string& id) {
   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
   CrxUpdateItem::FindById finder(id);
   UpdateItems::iterator it = std::find_if(work_items_.begin(),
                                           work_items_.end(),
                                           finder);
@@ skipping 337 matching lines @@
   ScheduleNextRun(false);
 }
 
 // The component update factory. Using the component updater as a singleton
 // is the job of the browser process.
 ComponentUpdateService* ComponentUpdateServiceFactory(
     ComponentUpdateService::Configurator* config) {
   DCHECK(config);
   return new CrxUpdateService(config);
 }