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

chrome/browser/prerender/prerender_manager.cc

Index: chrome/browser/prerender/prerender_manager.cc
diff --git a/chrome/browser/prerender/prerender_manager.cc b/chrome/browser/prerender/prerender_manager.cc
index d7030d452f73c45a1377cc180217768062383c5b..31ed50391b841ace905487da01c06e80ee8257ae 100644
--- a/chrome/browser/prerender/prerender_manager.cc
+++ b/chrome/browser/prerender/prerender_manager.cc
@@ -181,7 +181,8 @@ class PrerenderManager::MostVisitedSites : public NotificationObserver {
       Init();
     } else {
       timer_.Start(base::TimeDelta::FromSeconds(3), this,
-                   &prerender::PrerenderManager::MostVisitedSites::Init);
+                   &prerender::PrerenderManager::MostVisitedSites::Init,
+                   FROM_HERE);
     }
   }
 
@@ -800,7 +801,8 @@ void PrerenderManager::StartSchedulingPeriodicCleanups() {
   repeating_timer_.Start(
       base::TimeDelta::FromMilliseconds(kPeriodicCleanupIntervalMs),
       this,
-      &PrerenderManager::PeriodicCleanup);
+      &PrerenderManager::PeriodicCleanup,
+      FROM_HERE);
 }
 
 void PrerenderManager::MaybeStopSchedulingPeriodicCleanups() {