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

chrome/browser/upgrade_detector_impl.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/upgrade_detector_impl.h"
 
 #include <string>
 
 #include "base/command_line.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 141 matching lines @@
   if (command_line.HasSwitch(switches::kDisableBackgroundNetworking))
     return;
   // Windows: only enable upgrade notifications for official builds.
   // Mac: only enable them if the updater (Keystone) is present.
   // Linux (and other POSIX): always enable regardless of branding.
 #if (defined(OS_WIN) && defined(GOOGLE_CHROME_BUILD)) || defined(OS_POSIX)
 #if defined(OS_MACOSX)
   if (keystone_glue::KeystoneEnabled())
 #endif
   {
-    detect_upgrade_timer_.Start(FROM_HERE,
+    detect_upgrade_timer_.Start(
         base::TimeDelta::FromMilliseconds(GetCheckForUpgradeEveryMs()),
         this, &UpgradeDetectorImpl::CheckForUpgrade);
   }
 #endif
 }
 
 UpgradeDetectorImpl::~UpgradeDetectorImpl() {
 }
 
 void UpgradeDetectorImpl::CheckForUpgrade() {
@@ skipping 15 matching lines @@
   // Stop the recurring timer (that is checking for changes).
   detect_upgrade_timer_.Stop();
 
   NotifyUpgradeDetected();
 
   // Start the repeating timer for notifying the user after a certain period.
   // The called function will eventually figure out that enough time has passed
   // and stop the timer.
   int cycle_time = CmdLineInterval().empty() ? kNotifyCycleTimeMs :
                                                kNotifyCycleTimeForTestingMs;
-  upgrade_notification_timer_.Start(FROM_HERE,
+  upgrade_notification_timer_.Start(
       base::TimeDelta::FromMilliseconds(cycle_time),
       this, &UpgradeDetectorImpl::NotifyOnUpgrade);
 }
 
 void UpgradeDetectorImpl::NotifyOnUpgrade() {
   base::TimeDelta delta = base::Time::Now() - upgrade_detected_time();
   std::string interval = CmdLineInterval();
 
   // A command line interval implies testing, which we'll make more convenient
   // by switching to seconds of waiting instead of days between flipping
@@ skipping 45 matching lines @@
 
 // static
 UpgradeDetectorImpl* UpgradeDetectorImpl::GetInstance() {
   return Singleton<UpgradeDetectorImpl>::get();
 }
 
 // static
 UpgradeDetector* UpgradeDetector::GetInstance() {
   return UpgradeDetectorImpl::GetInstance();
 }