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

chrome/browser/instant/instant_controller.cc

Index: chrome/browser/instant/instant_controller.cc
diff --git a/chrome/browser/instant/instant_controller.cc b/chrome/browser/instant/instant_controller.cc
index 7334e48026702307fbdfc2473f8424fd2b282d92..cf3f7bd3ff554f5537676577c7cb3013b1c0f3af 100644
--- a/chrome/browser/instant/instant_controller.cc
+++ b/chrome/browser/instant/instant_controller.cc
@@ -515,7 +515,7 @@ void InstantController::InstantStatusChanged(InstantLoader* loader) {
     // Status isn't ok, start a timer that when fires shows the result. This
     // delays showing 403 pages and the like.
     show_timer_.Stop();
-    show_timer_.Start(
+    show_timer_.Start(FROM_HERE,
         base::TimeDelta::FromMilliseconds(kShowDelayMS),
         this, &InstantController::ShowTimerFired);
     UpdateDisplayableLoader();
@@ -664,7 +664,8 @@ void InstantController::ScheduleUpdate(const GURL& url) {
   scheduled_url_ = url;
 
   update_timer_.Stop();
-  update_timer_.Start(base::TimeDelta::FromMilliseconds(kUpdateDelayMS),
+  update_timer_.Start(FROM_HERE,
+                      base::TimeDelta::FromMilliseconds(kUpdateDelayMS),
                       this, &InstantController::ProcessScheduledUpdate);
 }
 
@@ -719,7 +720,7 @@ void InstantController::UpdateLoader(const TemplateURL* template_url,
                          user_text, verbatim, suggested_text)) {
     show_timer_.Stop();
     if (!new_loader->http_status_ok()) {
-      show_timer_.Start(
+      show_timer_.Start(FROM_HERE,
           base::TimeDelta::FromMilliseconds(kShowDelayMS),
           this, &InstantController::ShowTimerFired);
     }