Update base/timer.h code to pass through Location from call sites.

chrome/browser/component_updater/component_updater_service.cc

Index: chrome/browser/component_updater/component_updater_service.cc
diff --git a/chrome/browser/component_updater/component_updater_service.cc b/chrome/browser/component_updater/component_updater_service.cc
index 8a753db791618abed22b7ab6cf1ac790086b3041..cc8249a3231d5b7dc68d44d3b644477b16248214 100644
--- a/chrome/browser/component_updater/component_updater_service.cc
+++ b/chrome/browser/component_updater/component_updater_service.cc
@@ -329,7 +329,7 @@ ComponentUpdateService::Status CrxUpdateService::Start() {
     NotificationService::NoDetails());
 
   timer_.Start(base::TimeDelta::FromSeconds(config_->InitialDelay()),
-               this, &CrxUpdateService::ProcessPendingItems);
+               this, &CrxUpdateService::ProcessPendingItems, FROM_HERE);
   return kOk;
 }
 
@@ -367,7 +367,7 @@ void CrxUpdateService::ScheduleNextRun(bool step_delay) {
   }
 
   timer_.Start(base::TimeDelta::FromSeconds(delay),
-               this, &CrxUpdateService::ProcessPendingItems);
+               this, &CrxUpdateService::ProcessPendingItems, FROM_HERE);
 }
 
 // Given a extension-like component id, find the associated component.